Question

Cards numbered from $1$ to $30$ are put in a box. A card is drawn randomly from the box. Find the probability of the card drawn that is not divisible by $3$.

• A. $\frac{2}{8}$
• B. $\frac{4}{7}$
• C. $\frac{1}{6}$
• D. $\frac{2}{3}$

Answer 1

The correct option is D $\frac{2}{3}$

Total number of cards $=30$
Number of cards divisible by $3=10$
So number of cards not divisible by $3=30-10=20$
Required probability $=\frac{20}{30}=\frac{2}{3}$