Answers

2015-03-18T21:02:54+05:30
N(A) = 285
n(B) = 195 
n(AUB) = 410
n(A'UB') = ?
n(AUB) = n(A) + n(B) - n(AᑎB) 
410 = 285 + 195 - n(AᑎB)
n(AᑎB) = 480 - 410 = 70
n(A'UB') = n(AᑎB)'
             = n(U) - n(AᑎB)
             = 500 - 70
n(A'UB') = 430
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