SETS 2

If n(AuB)=437 , n(B)= 300 and n(AnB)=70, find n(A).

Solution

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

        437  =  n(A) + 300 – 70

        437  = n(A) +  230

       437 - 230   = n(A)

       n(A)= 207

hence n(A)= 207 answer

TRY THIS……..

If n(AuB)=480 , n(B)= 320 and n(AnB)=190, find n(A).