Question

For events A and B, the following probabilities are known:

Pr[A∪B]=0.8Pr[A]=0.5
What is the value of Pr[B] if A and B are disjoint?P if A

Answer 1

Anybody know how to do this?

Answer 2

Nobody knows how to do this?

Answer 3

yeah if they are disjoint then the probability of the union is the sum of the probabilities

Answer 4

so
\[P(A)+P(B)=P(A\cup B)\] you have two out of the three numbers you need to find the third one

Answer 5

Just add the numbers together?

Answer 6

0.8 and 0.5?