Question

if n(A )= 8, n(B) = 7 and n(A UB) 12 find!
n(B-A), n{p(A)}​

Answer 1

Answer:

we have the formula n(A u B)=n(A)+n(B)-n(A ∩ B)

11=7+5-n(A ∩ B)

n(A ∩ B)=7+5–11

n(A ∩ B)=12–11=1

Step-by-step explanation:

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