Question 1 :
The probability expressed as a percentage of a particular occurrence can never be
Question 2 :
Which of the following cannot be the probability of an event?
Question 3 :
State True or False. In a grouped frequency distribution, it is not possible to determine the mode by looking at the frequencies. To find the mode of grouped data, locate the class with the maximum frequency. This class is known as the modal class. The mode of the data is a value inside the modal class.
Question 4 : The times, in seconds, taken by 150 atheletes to run a 110 m hurdle race are tabulated below :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b71273b2305849799a4.jpg' />
The number of atheletes who completed the race in less then 14.6 seconds is :
Question 5 :
If $x_i$’s are the mid points of the class intervals of grouped data, $f_i$’s are the corresponding frequencies and $\bar{x}$ is the mean, then $(f_i * x_i - \bar{x})=$
Question 6 :
If n is the total number of observations, locate the class whose cumulative frequency is greater than (and nearest to) $\frac{n}{2}$.Is it TRUE or FALSE that, this class is called the median class.
Question 7 :
A card is selected at random from a well shuffled deck of 52 playing cards. The probability of its being a face card is
Question 8 :
In the formula, $\bar{x} = a + h\frac{f_i * u_i}{f_i}$, for finding the mean of grouped frequency distribution, $u_i =$
Question 9 :
A bag contains 3 red balls, 5 white balls and 7 black balls. What is the probability that a ball drawn from the bag at random will be neither red nor black?
Question 10 : For the following distribution :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b6f273b2305849799a1.PNG' />
The sum of lower limits of the median class and modal class is
Question 11 :
A school has five houses A, B, C, D and E. A class has 23 students, 4 from house A, 8 from house B, 5 from house C, 2 from house D and rest from house E. A single student is selected at random to be the class monitor. The probability that the selected student is not from A, B and C is
Question 12 :
If the probability of an event is p, the probability of its complementary event will be
Question 13 :
The probability of getting a bad egg in a lot of 400 is 0.035. The number of bad eggs in the lot is
Question 14 :
In any situation that has only two possible outcomes, each outcome will have probability $\frac{1}{2}$.
Question 16 :
When a die is thrown, the probability of getting an odd number less than 3 is
Question 17 :
State True or False: To find the mean of grouped data, it is assumed that the frequency of each class interval is centred around its mid-point.
Question 18 : Consider the following frequency distribution :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b70273b2305849799a2.PNG' />
The upper limit of the median class is
Question 20 : For the following distribution:
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b70273b2305849799a3.jpg' />
The modal class is
Question 21 :
While computing mean of grouped data, we assume that the frequencies are
Question 22 : Consider the following frequency distribution of the heights of 60 students of a class :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b8e273b2305849799c9.PNG' />
The sum of the lower limit of the modal class and upper limit of the median class is?
Question 23 :
The abscissa of the point of intersection of the less than type and of the more than type cumulative frequency curves of a grouped data gives its
Question 24 :
In the formula $\bar{x} = a + \frac{f_i d_i}{f_i}$ for finding the mean of grouped data $d_i$’s are deviations from a of
Question 25 :
The probability that a non leap year selected at random will contain 53 sundays is
Question 26 :
A card is selected from a deck of 52 cards. The probability of its being a red face card is
Question 27 :
A girl calculates that the probability of her winning the first prize in a lottery is 0.08. If 6000 tickets are sold, how many tickets has she bought?
Question 28 : Consider the data:
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b72273b2305849799a5.jpg' />
The difference of the upper limit of the median class and the lower limit of the modal class is
Question 29 :
Someone is asked to take a number from 1 to 100. The probability that it is a prime is
Question 30 : Consider the following distribution :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b72273b2305849799a6.jpg' />
The frequency of the class 30-40 is
