Question

There are 10 marbles in a box which are marked with the distinct numbers from 1 to 10. If a marble is drawn, then what is the probability of getting a marble being a number multiple of 3?

• A. $\frac{2}{5}$
• B. $\frac{1}{2}$
• C. $\frac{9}{5}$
• D. $\frac{3}{10}$
  

Answer 1

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


The numbers marked on the marbles are 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10.
Multiples of 3 between 1 and 10 are 3, 6, and 9
∴ Number of favourable outcomes = 3
Therefore, the required probability $=\frac{3}{10}$