Question

If n(A - B) = 12, n(B - A) = 16 and n(A n B) = 5, find:
a) n(A) b) n(B) C) n(A U B)

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Step-by-step explanation:

n( A - B) = n(A) - n(AnB)

so, 12 = n(A) - 5

n(A) = 17

n(B - A) = n(B) - n(AnB)

n(B) = 16 + 5 = 21

n(AuB) = n(A) + n(B) - (AnB)

= 17 + 21 - 5

= 33