CMAT 2022 Solved Question Paper

Let the number of boys be $4\mathrm{x}$ and number of girls be $6\mathrm{x}$
Given, $4\mathrm{x}+6\mathrm{x}=50$
$\mathrm{x}=5$
Number of boys $=20$ and number of girls $=30$
Average marks of girls $=60$
Total marks scored by girls $=60\mathrm{times}30=1800$
Average marks score by batch $=62$
Total marks scored by batch $=62\mathrm{times}50=3100$
Marks scored by boys $=3100-1800=1300$
Average marks of boys $\frac{20}{1300}=65$
Answer is option D.