Question

A box has $8$ red balls, $5$ yellow and $7$ green. If a ball is extracted at random, calculate the probability that it will be red.

• A. $\frac{2}{5}$
• B. $\frac{3}{5}$
• C. $\frac{5}{20}$
• D. none of these

Answer 1

The correct option is A $\frac{2}{5}$

Given:

Total number of balls = 8 red balls + 5 yellow + 7 green =20

To find:

The probability that it will be red

$P\left(\text{getting a red ball}\right)=\frac{\text{number of red balls}}{\text{Total number of balls}}=\frac{8}{20}=\frac{2}{5}$