Question

A glass jar contains 6 red, 5 green, 4 blue, and 5 yellow marbles of same size. Hari takes out a marble of red colour. What is the probability that the chosen marble is of red colour?

• A. $\frac{7}{10}$
• B. $\frac{3}{10}$
• C. $\frac{4}{5}$
• D. $\frac{2}{5}$

Answer 1

The correct option is B $\frac{3}{10}$

The jar contains 6 red, 5 green, 4 blue, and 5 yellow marbles of same size. Then, the probability that the chosen marble is of red colour
$=\frac{\text{Number of red marbles}}{\text{Total number of marbles}}=\frac{6}{6+5+4+5}=\frac{6}{20}=\frac{3}{10}$