Sets - Jamb Mathematics Past Questions and Answers

Question 16:

• JAMB 2015

X and Y are two sets such that n(X) = 15, n(Y) = 12 and n{X ∩ Y} = 7. Find ∩{X ∪ Y}

A. 21
B. 225
C. 15
D. 20

Question 17:

• JAMB 2015

Given that A = {1, 5, 7}
B = {3, 9, 12, 15}
C = {2, 4, 6, 8}
Find (A ∪ B) ∪ C

A. {1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15}
B. {1, 2, 3, 5, 6, 8, 12, 15}
C. {2, 4, 5, 9, 12, 15}
D. {1, 5, 6, 7, 8, 9, 12, 15}

Question 18:

• JAMB 2015

Given that A = {3, 4, 1, 10, 1/3 }
B = {4, 3 1/3, 1/3, 7}.
Find A∩B

A. {}
B. {1/3, 1, 2}
C. {3, 4, 1/3}
D. {1, 3, 1/3}

Question 19:

• JAMB 2015

Given that S and T are sets of real numbers such that S = {x : 0 \(\leq\) x \(\leq\) 5} and T = {x : − 2 < x < 3} Find S \(\cup\) T

A. −3 < x < \(\leq\)3
B. −2 < x < \(\leq\)5
C. 2 < x < \(\geq\) −5
D. −1 < x \(\geq\) \(\leq\)2

Question 20:

• JAMB 2015

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

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