Question

Let A and B be two events, such that P(A) =0.0902 , P(B) =0.699,and P(A and B) =0.0557. p(A or B) = (round the answer to 4 decimals)

Answer 1

In order to find p(A or B), we just need to use the following probability formula:

$p(\text{A or B)}=p(A)+p(B)-p(\text{A and B)}$

Using the values given in the question, we have that:

$\begin{gathered} p(\text{A or B)}=0.0902+0.699-0.0557 \\ p(\text{A or B)}=0.7335 \end{gathered}$

So we have that p(A or B) is equal 0.7335