If n(A)= 85 , n(B)= 96
and n(AuB)= 136, find n(AnB).
Solution
n(AuB) = n(A) + n(B) -
n(AnB)
136 = 85 + 96 - n(AnB)
136 = 181 - n(AnB)
136 - 181 = - n(AnB)
-45 = -n(AnB)
n(AnB) = 45 [after dividing
by -1 both sides]
Hence n(AnB) = 45
answer
TRY
THIS………….
If n(A)= 99 , n(B)= 92
and n(AuB)= 133, find n(AnB).
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