Question

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 not red is

• A. $\frac{5}{12}$
• B. $\frac{4}{12}$
• C. $\frac{3}{12}$
• D. $\frac{3}{4}$

Answer 1

The correct option is D $\frac{3}{4}$

Total number of cases$=5+4+3=12$

Number of favorable cases$=5+4=9$ (No red ball)

$\therefore$ probability$=\frac{\text{favorabe}}{\text{total}}=\frac{9}{12}=\frac{3}{4}$

Option D is correct.