Practice Questions on Probability
Aptitude Questions and Answers

Moderate Probability Question - 21

Q21.

There are 2 positive integers $x$ and $y$. What is the probability that $x+y$ is odd?

A.

1/4

B.

1/3

C.

1/2

D.

1/5

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Moderate Probability Question - 22

Q22.

Abhishek has 9 pairs of dark blue socks and 9 pairs of black socks. He keeps them all in the same bag. If he picks out three socks at random, then what is the probability that he will get a matching pair?

A.

$1$

B.

$\dfrac{2\times ^9C_2\times ^9C_1}{{18}^C_3}$

C.

$\dfrac{ ^9C_3\times ^9C_1}{{18}^C_3}$

D.

None of these

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Moderate Probability Question - 23

Q23.

The probability that a arrow fired from a point will hit the target is 1/4. Three such arrows are fired simultaneously towards the target from that very point. What is the probability that the target will be hit?

A.

19/64

B.

23/64

C.

23/67

D.

37/64

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Moderate Probability Question - 24

Q24.

$A$ and $B$ play a game where each is asked to select a number from 1 to 5. If the two numbers match, both of them win a prize. The probability that they will not win a prize in a single trial is:

A.

1/25

B.

24/25

C.

20/25

D.

23/25

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Moderate Probability Question - 25

Q25.

A 5-digit number is formed by the digits 1,2,3,4, and 5 without repetition. What is the probability that the number formed is a multiple of 4?

A.

1/2

B.

1/3

C.

1/4

D.

1/5

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