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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
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Correct Answer: Option A
Explanation

n(PuQ) = n(p) + n(q) -  n(PnQ)

40 = 20 + 30 -  n(PnQ)

n(PnQ) = 50 - 40 = 10

There is an explanation video available below.

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Explanation Video

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