Question

if n(A)=3 and n(B)= 6, and A is a subset of B, then n(A U B)=​

Answer 1

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Answer 2

Step-by-step explanation:

n(A)=3 n(B)=6

A is a subset of B

Then n(AnB)=n(A)=3

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

=3+6-3

=6