Q58 / 200 · TS EAMCET 2002 · Mathematics
A bag contains 5 black balls, 4 white balls and 3 red balls. If a ball is selected at random, the probability that it is a black or a red ball, is
- A$\frac{1}{3}$
- B$\frac{1}{4}$
- C$\frac{5}{12}$
- Correct answerD$\frac{2}{3}$
Solution
Required probability
$$
=\frac{5 C_1+3 C_1}{12 C_1}=\frac{5+3}{12}=\frac{8}{12}=\frac{2}{3}
$$
Hence, the correct answer is option: 'D'.