Exercise 9.3: Multiple choice questions

Exercise 9.3

Multiple choice questions

1. A number between 0 and 1 that is used to measure uncertainty is called

(1) Random variable

(2) Trial

(3) Simple event

(4) Probability

[Answer: (4) Probability]

2. Probability lies between

(1) −1 and +1

(2) 0 and 1

(3) 0 and n

(4) 0 and ∞

[Answer: (2) 0 and 1]

3. The probability based on the concept of relative frequency theory is called

(1) Empirical probability

(2) Classical probability

(3) Both (1) and (2)

(4) Neither (1) nor (2)

[Answer: (1) Empirical probability]

4. The probability of an event cannot be

(1) Equal to zero

(2) Greater than zero

(3) Equal to one

(4) Less than zero

[Answer: (4) Less than zero]

5. The probability of all possible outcomes of a random experiment is always equal to

(1) One

(2) Zero

(3) Infinity

(4) Less than one

[Answer: (1) One]

6. If A is any event in S and its complement is A’ then, P(A′) is equal to

(1) 1

(2) 0

(3) 1−A

(4) 1−P(A)

[Answer: (4) 1−P(A)]

7. Which of the following cannot be taken as probability of an event?

(1) 0

(2) 0.5

(3) 1

(4) −1

[Answer: (4) −1]

8. A particular result of an experiment is called

(1) Trial

(2) Simple event

(3) Compound event

(4) Outcome

[Answer: (4) Outcome]

9. A collection of one or more outcomes of an experiment is called

(1) Event

(2) Outcome

(3) Sample point

(4) None of the above

[Answer: (1) Event]

10. The six faces of the dice are called equally likely if the dice is

(1) Small

(2) Fair

(3) Six-faced

(4) Round

Solution: Fair means all outcomes are equally likely.

[Answer: (2) Fair]

Exercise 9.3

1. (4) 2. (2) 3. (1) 4. (4) 5. (1) 6. (4) 7. (4) 8. (4) 9. (1) 10. (2)