Wednesday 5 June 2013

SETS - 2




If n(AuB)=430 , n(B)= 300 and n(AnB)=70, find n(A).

Solution

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

        430  =  n(A) + 300 – 70

        430  = n(A) +  230

       430 - 230   = n(A)

       n(A)= 200

hence n(A)= 200 answer

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