Question

solve the problem. the events a and b are mutually exclusive. if p(a) = 0.7 and p(b) = 0.2, what is p(a or b)?

Answer 1

Hi,

0.9

Explanation:

p(a)=0.7

p(b)=0.2

p(a and b)=0 (mutually exclusive)

p(a or b)=p(a)+p(b)-p(a and b)=0.7+0.2-0=0.9