Question

If A, B and C are three non- empty sets such that n( ABC)=10 and n(AAB)=n(BAC) = n(CAA)=60, then the number of elements in AU BUCis​

Answer 1

Step-by-step explanation:

A={1,2,3,4,5}

B={4,5,6,7,8}

C={7,8,9,10,11}

D={10,11,12,13,14}

(A∩B)∩(B∩C)

=({1,2,3,4,5}∩{4,5,6,7,8})∩({4,5,6,7,8}∩{7,8,9,10,11})

={4,5}∩{7,8}

=ϕ