Saturday 8 February 2014

SETS B13

If n(A)= 62 , n(B)= 98 and n(AnB)=20, find n(AuB).

Solution

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

             = 62 + 98 – 20

             = 160 – 20

             = 140

Hence n(AuB) = 140 answer


TRY THIS………….


If n(A)= 100 , n(B)= 178 and n(AnB)=80, find n(AuB).





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