Waec Mathematics Past Questions and Answers

Question 211:

• WAEC 1991

Find the median of the distribution

A. 9
B. 6.5
C. 5
D. 4.5
E. 4

Question 212:

• WAEC 1991

If events X and Y are mutually exclusive, . P(X) = 1/3 and P(Y) = 2/5, P(X∩Y) is

A. O
B. 2/15
C. 11/15
D. 4/15
E. 1

Question 213:

• WAEC 1991

If events X and Y are mutually exclusive, P(X) = 1/3 and P(Y) = 2/5, P(X∪Y) is

A. O
B. 2/15
C. 4/14
D. 11/15
E. 1

Question 214:

• WAEC 1991

A box contains 2 white and 3 blue identical marbles. If two marbles are picked at random, one after the other without replacement, what is the probability of picking two marbles of different colors?

A. 2/3
B. 3/5
C. 2/5
D. 7/20
E. 3/10

Question 215:

• WAEC 1991

Mrs. Jones is expecting a baby. The probability that it will be a boy is 1/2 and probability that the baby will have blue eyes is 1/4. What is the probability that she will have a blue-eyed boy?

A. 1/8
B. ¹/₄
C. 3/8
D. ¹/₂
E. 3/4