STATISTICS - Jamb Mathematics Past Questions and Answers

Question 256:

• JAMB 2006

If the mean of five consecutive integers is 30, find the largest of the numbers

A. 28
B. 30
C. 32
D. 34

Question 257:

• JAMB 2006

A bag contains 5 black, 4 white and x red marbles. If the probability of picking a red marble is ²/₃, find the value of x

A. 8
B. 10
C. 4
D. 6

Question 258:

• JAMB 2006

Find the variance of 2x, 2x-1 and 2x+1

A. 2/3
B. 2
C. √(2/3)
D. 1

Question 259:

• JAMB 2006

The table above shows the distribution of recharge cards of four major GSM operators. What is the probability that a recharge card selected at random will be GTN or Qtel?

A. 3/20
B. 1/4
C. 2/5
D. 3/4

Question 260:

• JAMB 2006

The pie chart above shows the expenditure of a family whose income is N30,000. If the expenditure on food is twice that on housing and that on school fees is twice that on transport, how much does the family spend on food?

A. N 28 000
B. N 25 500
C. N15 000
D. N 12 500