CBSE Class 9 Maths Probability Chapter 15 MCQ

CBSE CLASS 9 MATHEMATICS/ MCQ
Multiple Choice Questions / PROBABILITY – Chapter 15

1. The probability of an event lies between ——– and ————

A. 0 and 1
B. 1 and 2
C. 0 and -1

2. The empirical (or experimental) probability p (E) of an event E is given by —

A. Number of trials in which E has happened / Total number of trials
B. Total number of trials / Number of trials in which E has happened.
C. None of these.

3. A coin is tossed 100 times with the following frequencies:
Head: 45, Tail: 55
The probability for each event is ———————

A. 0.45, 0.55
B. 4.5, 5.5
C. 0.045, 0. 055

4. If P (E) = 0.47 then P (not E) will be ————–

A. 0.47
B. 0.53
C. 0.03

5. Probability of getting odd number in a single throw of dice is ————-

A. ¼
B. ½
C. 1/6

6. Empirical probability of an event is also known as —————-

A. Experimental probability
B. Subjective probability
C. Classic probability

7. When a dice is thrown once, the probability of getting a number 2 or 3 is —–

A. ½
B. 1/3
C. ¼

8. When a coin is tossed, the probability of getting head is ———-

A. ½
B. ¼
C. 1/6

9. There are 4 red and 3 blue balls in a basket. The probability of getting a blueball is ————–

A. 3/7
B. 4/7
C. 7/7

10. The probability of getting an ace card from a well shuffled pack of 52 cardsis —————–

A. 1/13
B. 12/13
C. 13/52

11. Which of the following cannot be the probability of an event?

A. 2/7
B. 0.75
C. 1.2

12. If an event cannot occur, then its probability is ———–

A. One
B. Zero
C. Two

13. Probability of a sure event is ————-

A. One
B. Two
C. Zero

14. Sum of the probabilities of all events of a trial is ————

A. One
B. Two
C. Zero

15. Performing an experiment once is called —————

A. Trial
B. Error
C. Sample

ANSWERS:

1. 0 and 1
2. P (E) = Number of trials in which E has happened / Total number of trials
3. P (H) = Number of heads / Total number of trials
P (H) = 45/ 100 = 0.45
P (T) = Number of tails / Total number of trials
P (T) = 55/ 100 = 0.55
4. 0.53
5. ½
6. Experimental probability
7.1/3
8. ½
9. 3/7
10. Number of ace cards = 4
P (A) = 4/52 = 1/ 13
11. 1.2 (Probability of any event cannot be more than 1)
12. Zero
13. One
14. One
15. Trial

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1 Response

  1. Eshaan Makkar says:

    Why the hell aren’t the answers given?

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