Question

findP(E or F) if P(E and F)= 0.15

Answer 1

Hint:

P(E or F) = P(E) + P(F) - P(E and F)

Answer 2

P(E)= 0.25 P(F)= 0.45

Answer 3

plug in the given info into that equation, then evaluate

Answer 4

then what do I do with 0.15?

Answer 5

\[P(E\cap F)=P(E)+P(F)-P(E\cup F)\\
0.15=0.25+0.45-P(E\cup F)\\
P(E\cup F)=\cdots\]