Question

M and N are having 20 and 30 pencils respectively. The students of the class they belong to, have 600 pencils in total. What is the ratio of number of pencils with M and N to the total number of pencils in the class?

• A. 1 : 6
• B. 2 : 9
• C. 1 : 12
• D. 1 : 15

Answer 1

The correct option is C 1 : 12

Since the required ratio is of number of pencils with M and N to the total number of pencils, we need
Number of pencils with M + N : Total number of pencils with the class.
$\Rightarrow$ (20+30) : 600
$\Rightarrow$ 50 : 600
$\Rightarrow$ 1 : 12