Probability aptitude

Question 1

Two fair dice are thrown. What is the probability that the sum is 8?

Accepted Answer

5/36

Answer

1/6

Answer

1/9

Answer

7/36

Question 2

A card is drawn from a well-shuffled deck of 52. What is the probability that it is a king or a heart?

Accepted Answer

4/13

Answer

17/52

Answer

1/4

Answer

1/13

Question 3

Three fair coins are tossed. What is the probability of getting at least two heads?

Accepted Answer

1/2

Answer

3/8

Answer

1/4

Answer

7/8

Question 4

A bag has 5 red and 3 blue balls. Two balls are drawn at random without replacement. What is the probability that both are red?

Accepted Answer

5/14

Answer

25/64

Answer

5/8

Answer

5/16

Question 5

The probabilities that A and B solve a problem independently are 0.4 and 0.5. What is the probability that the problem gets solved?

Accepted Answer

0.7

Answer

0.9

Answer

0.2

Answer

0.45

Question 6

A number is picked at random from 1 to 50. What is the probability that it is a multiple of 3 or 5?

Accepted Answer

23/50

Answer

29/50

Answer

26/50

Answer

1/2

Question 7

Two fair dice are thrown. What is the probability that the product of the numbers is even?

Accepted Answer

3/4

Answer

1/2

Answer

1/4

Answer

2/3

Question 8

What is the probability that a randomly chosen leap year has 53 Sundays?

Accepted Answer

2/7

Answer

1/7

Answer

3/7

Answer

1/366