Introduction to Probability, Class 11 Mathematics NCERT Solutions

1. There will be total 10  MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. The sample space of an experiment is
S = {HHH, HHT, HTH, THH, HTT, THT, TTH, TTT}
and A = {TTT}, B = {HTT, THT, TTH}, C = {HHT, HTH, THH, HHH},
then A, B and C form a set of?

  Mutually exclusive but not exhaustive events

 Exhaustive but not mutually exclusive events

 Mutually exclusive and exhaustive events

 Neither mutually exclusive nor exhaustive events

Question 1 of 10

2. When the sets A and B are two events associated with a sample space, then ‘A ∩ B’ is the event.

 Either A or B or both

 Only one of the two, A or B

 Both A and B

 Neither A nor B

Question 2 of 10

3. If an event has more than one sample point, it is called a ………

 Exhaustive event

 Compound event

 Simple event

  Mutually exclusive event

Question 3 of 10

4. The numbers 2, 4, 6, 8 and 10 are written separately on five slips of paper. The slips are put in a box and mixed thoroughly. A person draws two slips from the box, one after the other, without replacement. Then, the sample space for the experiment is:

A. B. C. D.

 A

 B

 C

 D

Question 4 of 10

5. If 2/7 is the probability of an event, then the probability of the event ‘not A’ is:

 5/7

 6/7

 2/7

 3/7

Question 5 of 10

6. A possible result of a random experiment is called its ……

 Favorable outcomes

 Event

 Outcome

 Experiment

Question 6 of 10

7. Two students Amit and Priyanka appeared in an examination. The probability that Amit will qualify the examination is 0.06 and that Priyanka will qualify the examination is 0.12. The probability that both will qualify the examination is 0.02. Then, the probability that both Amit and Priyanka will not qualify the examination is:

  0.91

 0.12

 0.84

 0.45

Question 7 of 10

8. The sample space associated to thrown a dice is:

  (1, 2, 3)

 (1, 2, 3, 4, 5, 6)

 (1, 3, 5)

  (2, 4, 6)

Question 8 of 10

9. An experiment involves rolling a pair of dice and recording the number that comes up.

Suppose,
A: the sum is greater than 8.
B: 2 occurs on either die.

Then A and B are ……. events.

 Random experiment

 Mutually exclusive events

 Exhaustive events

 Favorable events

Question 9 of 10

10. A box contains 15 red marbles, 15 blue marbles and 30 green marbles. 5 marbles are drawn from the box, what is the probability that atleast one will be green?

A. B. C.   zero

D.  1

 A

 B

 C

 D

Question 10 of 10

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