Jamb Mathematics 2015 Past Questions and Answers

Question 51:

• JAMB 2015

The area of an ellipse is 132cm².The length of its major axis is 14cm.Find the length of it minor axis

A. 10.5cm
B. 5cm
C. 10cm
D. 12cm

Question 52:

• JAMB 2015

The volume of a cone (s) of height 6cm and base radius 5cm is

A. 157cm³
B. 155cm³
C. 175cm³
D. 145cm³

Question 53:

• JAMB 2015

The probability of an outcome A is 1/6 . The probability of the B outcome is 1/4 . If the probability of A or B or both is 1/12 . What is the probability of both outcomes A and B?

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

Question 54:

• JAMB 2015

Given that Z = {1,2,4,5} what is the power of set Z?

A. 16
B. 8
C. 10
D. 12

Question 55:

• JAMB 2015

Calculate the value of x and y if (27^x ÷ 81^x+2y) = 9 ,x + 4y = 0

A. X = 1, y = 1/2
B. X = 2, y = — 1/2
C. X − 0, y = 1
D. X = 2, y = —1