Question

Two sets A and B are such that n(AuB) =21 n(A) =10 n(B) = 15 find n(AnB) and n(A-B)
please answer fast​

Answer 1

Answer:

i have gf okay one real and 5 as sis idk how i got them

how i look??

Answer 2

Answer:

n(A)=15, n(B)=21 & n(AUB)=21

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

36=15+21-n(AnB)

n(AnB)=36–36

n(AnB)=0

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