A bag contains `5` black balls, `4` white balls and `3` red balls. If a ball is selected random wise, the probability that if is black or red balls is

Options

A. a) `1/3`
B. b) `1/4`
C. c) `5/(12)`
D. d) `2/3`

Answer

d) `2/3`

Explanation

Total sample space `= 12_(C_1) = 12`


Favorable cases `= 5_(C_1) + 3_(C_1) `


`= 5+3 = 8`


Probability of if is black or red balls is `= 8/12 = 2/3`.


Hence, correct option is d)