Probability - Jamb Mathematics Past Questions and Answers

Question 1:

• JAMB 2019

If a fair coin is tossed 3 times, what is the probability of getting at least two heads?

A. \(\frac{2}{3}\)
B. \(\frac{4}{5}\)
C. \(\frac{2}{5}\)
D. \(\frac{1}{2}\)

Question 2:

• JAMB 2019

Find the probability that a number selected at random from 21 to 34 is a multiple of 3

A. \(\frac{3}{11}\)
B. \(\frac{2}{9}\)
C. \(\frac{5}{14}\)
D. \(\frac{5}{13}\)

Question 3:

• JAMB 2018

If X, Y can take values from the set (1, 2, 3 ,4), find the probability that the product of X and Y is not greater than 6

A. \(\frac{5}{8}\)
B. \(\frac{5}{16}\)
C. \(\frac{1}{2}\)
D. \(\frac{3}{8}\)

Question 4:

• JAMB 2018

A box contains two red balls and four blue balls. A ball is drawn at random from the box and then replaced before a second ball is drawn. Find the probability of drawing two red balls.

A. \(\frac{2}{3}\)
B. \(\frac{1}{3}\)
C. \(\frac{1}{4}\)
D. \(\frac{1}{9}\)

Question 5:

• JAMB 2018

Tossing a coin and rolling a die are two separate events. What is the probability of obtaining a tail on the coin and an even number on the die?

A. \(\frac{1}{16}\)
B. \(\frac{1}{6}\)
C. \(\frac{1}{4}\)
D. \(\frac{3}{8}\)