If P(A) = 0.4 and P(B)= 0.7 and P(A∩B) = 0.5 then the value of P(AUB)  is-

0.4 0.5 0.6 0.8

0.6

We have P(A) = 0.4 and P(B)= 0.7 and P(A∩B) = 0.5  We know that P(A∪B) = P(A) +P(B) -P(A∩B)                                 =  0.4 +0.7 -0.5                   ⇒ P(A∪B) = 0.6