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 Green.

• A. $\frac{7}{20}$
• B. $\frac{5}{20}$
• C. $\frac{8}{20}$
• D. none of these

Answer 1

The correct option is A $\frac{7}{20}$

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

$P\left(E\right)=\frac{bal{l}_{green}}{total.balls}=\frac{7}{8+5+7}=\frac{7}{20}$