Question

Q17. À box contains 4 red, 6 blue and 5 white balls. A man draws one ball at random. If he draws a red
ball, he gets Rs 6, if he draws a blue ball, he gets Rs. 3 , and he pays Rs. 3 if he gets a white ball. The
expected value of his gain is:
(a) 4/5
(b) 7/5
(c) 9/5
(d) None of these​

Answer 1

the expected value of his gain is 9 /5