Question

3 bags contain 3 red, 4 black balls, 4 red, 5 black balls; 5 red, 2 black balls. If one bag is selected at
random and a ball is drawn from it then the probability that it is red is
​

Answer 1

Answer:

Let P(R) denote the event of selecting a red ball.

From Baye's theorem,

P(R)=1/3(3/7)+1/3(4/9)+1/3(5/7)

The required probability is 1/7+4/27+5/21

8/21+4/27

0.529100529.

Hope it helps u........