Question 1 :
Consider a small unit of a factory where there are 5 employees : a supervisor and four labourers. The labourers draw a salary of rupees 5,000 per month each while the supervisor gets rupees 15,000 per month. Calculate the mean of the salaries of this unit of the factory.
Question 2 :
Classify the given data as primary or secondary: electricity bills of our house for last two years.
Question 3 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d225f59b460d7261f54e.PNG' />
In the above image, a table showing the weekly observations made in a study on the cost of living index in a city is given. Find the class-mark for the interval 140 - 150.
Question 4 :
The following number of goals were scored by a team in a series of 10 matches: 2, 3, 4, 5, 0, 1, 3, 3, 4, 3 . Find the mean of these scores.
Question 5 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d223f59b460d7261f54b.PNG' />
In the above image, a bar graph representing the months of the birth of 40 students in a particular section of Class IX is given. In which month were the maximum number of students born?
Question 6 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d227f59b460d7261f551.PNG' />
In the above image, the points scored by a Kabaddi team in a series of matches are given. Find the median of the points scored by the team.
Question 7 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d21ff59b460d7261f546.PNG' />
In the given image, a raw data of the marks obtained by 10 students in a mathematics test is given, from this, find the difference between the highest and the lowest marks.
Question 8 :
Consider a small unit of a factory where there are 5 employees : a supervisor and four labourers. The labourers draw a salary of rupees 5,000 per month each while the supervisor gets rupees 15,000 per month. Calculate the mode of the salaries of this unit of the factory.
Question 9 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d229f59b460d7261f555.PNG' />
In the above image, a grouped frequency distribution table for the relative humidity (in %) of a certain city for a month of 30 days is given. What is the range of this data?
Question 10 :
Consider a small unit of a factory where there are 5 employees : a supervisor and four labourers. The labourers draw a salary of rupees 5,000 per month each while the supervisor gets rupees 15,000 per month. Calculate the median of the salaries of this unit of the factory.
Question 11 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d232f59b460d7261f561.PNG' />
In the above image, the table gives the life times of 400 neon lamps. How many lamps have a life time of more than 700 hours?
Question 12 :
The following number of goals were scored by a team in a series of 10 matches: 2, 3, 4, 5, 0, 1, 3, 3, 4, 3 . Find the median of these scores.
Question 13 :
Classify the given data as primary or secondary: number of fans in our school.
Question 14 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d22bf59b460d7261f557.PNG' />
In the above image, a grouped frequency distribution table for the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city for 30 days is given. For how many days, was the concentration of sulphur dioxide more than 0.11 parts per million?
Question 15 :
The value of $\pi$ upto 50 decimal places is : 3.14159265358979323846264338327950288419716939937510 . What is/are the most frequently occurring digit(s)?
Question 16 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d22af59b460d7261f556.PNG' />
In the above image, a grouped frequency distribution table representing the heights of 50 students, measured to the nearest centimetres is given.What can you conclude about their heights from the table?
Question 17 :
The following observations have been arranged in ascending order. If the median of the data is 63, find the value of x. 29, 32, 48, 50, x, x + 2, 72, 78, 84, 95
Question 18 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d224f59b460d7261f54d.PNG' />
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc1ada78c526e972caf091.PNG' />
In the above image1, a table showing the marks obtained by 51 students of a class in a test out of 100 is given and the image 2 shows a frequency polygon that represents this data. Examine whether it is correct.
Question 19 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d230f59b460d7261f55e.PNG' />
In the above image, a table showing the seats won by different political parties in the polling outcome of a state assembly elections is given. Which political party won the maximum number of seats?
Question 20 :
The following number of goals were scored by a team in a series of 10 matches: 2, 3, 4, 5, 0, 1, 3, 3, 4, 3 . Find the mode of these scores.
Question 21 :
Classify the given data as primary or secondary: number of students in our class.
Question 22 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d22ef59b460d7261f55b.PNG' />
In the above image, table showing the figures founded in a survey conducted by an organisation for the cause of illness and death among the women between the ages 15 - 44 (in years) worldwide is given. Which condition is the major cause of women’s ill health and death worldwide?
Question 23 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d222f59b460d7261f54a.PNG' />
In the above image, a bar graph representing the months of the birth of 40 students in a particular section of Class IX is given. How many students were born in the month of November?
Question 24 :
In a mathematics test given to 15 students, the following marks (out of 100) are recorded: 41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60 . Find the mean of this data.
Question 25 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d220f59b460d7261f547.PNG' />
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc1ada78c526e972caf08f.PNG' />
First image shows the marks obtained (out of 100 marks) by 30 students of Class IX of a school and the second image shows an ungrouped frequency distribution table for this data. Is the table correct ?
Question 26 :
Classify the given data as primary or secondary: election results obtained from television or newspapers.
Question 27 :
In a mathematics test given to 15 students, the following marks (out of 100) are recorded: 41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60 . Find the median of this data.
Question 28 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d22cf59b460d7261f559.PNG' />
In the above image, a grouped frequency distribution table for the number of hours 30 children watched TV programmes
in the previous week is given.How many children watched television for 15 or more hours a week?
Question 29 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d233f59b460d7261f562.PNG' />
In the above image, the table shows a frequency distribution of the number of letters in the English alphabet in the surnames of 100 surnames that were randomly picked up from a local telephone directory. In which class interval, the maximum number of surnames lie ?
Question 30 :
Find the mode of 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18.
Question 31 :
In a mathematics test given to 15 students, the following marks (out of 100) are recorded: 41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60 . Find mode of this data.
Question 32 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d223f59b460d7261f54c.PNG' />
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc1ada78c526e972caf090.PNG' />
In the above image 1, a table in which the performance of two sections of students in a mathematics test of 100 marks is recorded is given and the image 2 shows a histogram for this data. Do you think that it correctly represents the data?
Question 33 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d221f59b460d7261f549.PNG' />
In the above image, a frequency distribution table which gives the weights of 38 students of a class is shown. In which class of the table should a new student weighing 35.5 kg be placed ?
Question 34 :
The value of $\pi$ upto 50 decimal places is : 3.14159265358979323846264338327950288419716939937510 . What is/are the least frequently occurring digit(s)?
Question 35 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d225f59b460d7261f54f.PNG' />
In the above image, the given data shows the marks obtained (out of 100 marks) by 30 students of Class IX of a school. Find the mean of the marks obtained by the 30 students.
Question 36 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d229f59b460d7261f554.PNG' />
In the above image, a grouped frequency distribution table for the relative humidity (in %) of a certain city for a month of 30 days is given.Which month or season do you think this data is about?
Question 37 :
Find the mode of the following marks (out of 10) obtained by 20 students: 4, 6, 5, 9, 3, 2, 7, 7, 6, 5, 4, 9, 10, 10, 3, 4, 7, 6, 9, 9
Question 38 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d226f59b460d7261f550.PNG' />
In the above image, the heights (in cm) of 9 students of a class are given. Find the median of this data.
Question 39 :
5 people were asked about the time in a week they spend in doing social work in their community. They said 10, 7, 13, 20 and 15 hours, respectively. Find the mean (or average) time in a week devoted by them for social work.
Question 40 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d221f59b460d7261f548.PNG' />
In the above image, a grouped frequency distribution table is shown. What is the class-width or class-size ?
