STATISTICS - Jamb Mathematics Past Questions and Answers

Question 356:

• JAMB 2021

4, 16, 30, 20, 10, 14 and 26 are represented on a pie chart. Find the sum of the angles of the bisectors representing all numbers equals to or greater than 16

A. 48^o
B. 84^o
C. 92^o
D. 276^o

Question 357:

• JAMB 2021

The mean of ten positive numbers is 16. When another number is added, the mean becomes 18. Find the eleventh number

A. 3
B. 16
C. 38
D. 30

Question 358:

• JAMB 2021

Two numbers are removed at random from the numbers 1, 2, 3 and 4. What is the probability that the sum of the numbers removed is even?

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

Question 359:

• JAMB 2021

Find the probability that a number selected at random from 41 to 56 is a multiple of 9

A. \(\frac{1}{8}\)
B. \(\frac{2}{15}\)
C. \(\frac{3}{16}\)
D. \(\frac{7}{8}\)

Question 360:

• JAMB 2021

Find the mean deviation of 1, 2, 3 and 4

A. 1.0
B. 1.5
C. 2.0
D. 2.5