Question

Events A and B are independent. Find the missing probability.

P(B)= 9/20 , P(A and B) = 9/100, P(A)= ?
answer in decimal form rounded to one decimal place

Answer 1

Answer: P(A) = 0.2 :D

Answer 2

Explanation:

events A and B are independent:

P(A and B) = P(A)×P(B)

9/100= P(A)×9/20

P(A) = (9/100)/(9/20)

P(A) = (9/100) ×(20/9) =180/900

P(A) = 0.2