It is windy in Dakota with probability 08 It is sunny with p

It is windy in Dakota with probability 0.8. It is sunny with probability 0.7. If it is windy in Dakota, it is also sunny with probability 0.6.

Find the probability that it is sunny OR windy.

P(A B)= It is sunny or windy
P(A) = it is windy
P(B)= it is sunny
P(A B)= it is sunny as well as windy
P(A B) = P(A) + P(B) - P(A B)
= 0.8+0.7-0.6
=0.9