Mean - Jamb Mathematics Past Questions and Answers

Question 31:

• JAMB 2002

Find the mean of the data: 7, -3, 4, -2, 5, -9, 4, 8, -6, 12

A. 3
B. 4
C. 1
D. 2

Question 32:

• JAMB 2002

The mean of a set of six numbers is 60. If the mean of the first five is 50, find the sixth number in the set.

A. 105
B. 100
C. 95
D. 110

Question 33:

• JAMB 2003

By how much is the mean of 30, 56, 31, 55, 43 and 44 less than the median?

A. 0.75
B. 0.50
C. 0.33
D. 0.17

Question 34:

• JAMB 2003

Find the mean of the distribution above

A. 1
B. 2
C. 3
D. 4

Question 35:

• JAMB 2004

The mean age of a group of students is 15 years. When the age of a teacher, 45 years old, is added to the age of the students, the mean of their ages becomes 18 years. Find the number of the students in the group

A. 9
B. 7
C. 42
D. 15