STATISTICS - Jamb Mathematics Past Questions and Answers

Question 111:

• JAMB 1985

If two fair coins are tossed, what is the probability of getting at least one head?

A. \(\frac{1}{4}\)
B. \(\frac{1}{2}\)
C. 1
D. \(\frac{43}{78}\)
E. \(\frac{3}{4}\)

Question 112:

• JAMB 1985

What is the probability that a number chosen at random from the intergers between 1 and 10 inclusive is either a prime or a multiple of 3?

A. \(\frac{7}{10}\)
B. \(\frac{3}{5}\)
C. \(\frac{4}{5}\)
D. \(\frac{3}{10}\)

Question 113:

• JAMB 1985

A bag contains 4 white balls and 6 red balls. Two balls are taken from the bag without replacement. What is the probability that they are both red?

A. \(\frac{2}{3}\)
B. \(\frac{2}{15}\)
C. \(\frac{1}{2}\)
D. \(\frac{1}{3}\)

Question 114:

• JAMB 1985

In a class of 120 students, 18 of them scored an A grade in mathematics. If the section representing the A grade students on a pie chart has angle Z^o at the centre of the circle, what is Z?

A. 15
B. 27
C. 50
D. 52
E. 54

Question 115:

• JAMB 1986

If Musa scored 75 in biology instead of 57, his average mark in four subjects would have been 60. What was his total mark?

A. 282
B. 240
C. 222
D. 210