Question

if n(A) = 50, n(B) = 20 and n(A n B) = 10 then n(A ∆ B) = ?​

Answer 1

Given,

n(A) =50,n(B)= 20 and n(AnB) =10

Explaination

n(A∆B)=n(A) +n(B) -n(AnB)

=50+20-10

=70-10 =60

So the answer is 60.

Hope I have been able to clear your doubt

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