If Pr(A)=0.35, Pr(B)=0.8 and Pr(A á´’ B)=0.2, what is Pr(A U B)?

Question

ᴒ- that is the best i could find for an upside down U

Answer 1

Pr(A or B)=Pr (A)+Pr(B)-Pr(A and B)

               =0.35+0.8-0.2=0.95

Answer 2

Here you go... ∩

By the way, P(A∩B) = P(A AND B) and P(AUB) = P(A OR B)

This will be handy to remember if you're in a probability class.

Remembering the formula:

P(A U B) = P(A) + P(B) - P(A ∩ B)

P(A U B) = 0.35 + 0.8 - 0.2

P(A U B) = 0.95

Answer 3

P(AUB)=0.95

Answer 4

P(A U B) = P(A) + P(B) - P(A ∩ B)