Question 1 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d234f59b460d7261f563.PNG' /> In the above image, a table showing salaries of 60 workers of a factory is given. Find the mean salary of the 60 workers.

Question 2 :
<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 3 :
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 4 :
<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 5 :
<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 6 :
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 7 :
<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 8 :
<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 9 :
<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 ?

Question 10 :
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.