If n(P) = 20 and n(Q) = 30 and n(PuQ) = 40, find the value
MATHEMATICS
JAMB 2022
If n(P) = 20 and n(Q) = 30 and n(PuQ) = 40, find the value n(PnQ)
- A. 10
- B. 30
- C. 15
- D. 40
Correct Answer: A. 10
Explanation
n(PuQ) = n(p) + n(q) - n(PnQ)
40 = 20 + 30 - n(PnQ)
n(PnQ) = 50 - 40 = 10
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