Question

$15$ cards numbered $1,2,3,4,...,14,15$ are put in a box and mixed thoroughly. A man draws a card at random form the box. Find the probability that the number on the card is divisible by $3$

Answer 1

We have,

Total number of cards$=15$

Number of card is divisible by $3$ $=(3,6,9,12,15)=5$

Then,

Probability of card is divisible by $3$$=\frac{5}{15}=\frac{1}{3}$

Hence, this is the answer.