Question

n(A)=285, n(B)=195, n(U)=500, n(AUB)=410 , find n(A'UB')

Answer 1

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

Answer 2

Step-by-step explanation:

the answer is in the attachment