Question

Rohit has $6$ black, $5$ blue and $7$ red pens. Find the ratio of the number of blue pens to the total number of pens.

Answer 1

Step 1: Find the total number of pens

Total number of pens = $6+5+7=18$

Step 2: Find the ratio

ratio of the number of blue pens to the total number of pens = $\frac{5}{18}=5:18$

Hence, the ratio between the number of blue pens to the total number of pens is $5:18$.