Question

If the Pr (A)=0.3 what is Pr (A’)

Answer 1

0.7

Explanation:

I assume Pr is for Probability and A' is "not A" (complementary probability)

Pr(Anything)=1

Pr(A)=0.3

Pr(A')=1-Pr(A) (anything but A)

Pr(A')=1-0.3

Pr(A')=0.7