A) 20%
B) 25%
C) 50%
D) 75%
Correct Answer: D
Solution :
Let the number of adults and children be 2x and 3x respectively. Then, literate population\[=(100-40)%\] of \[2x+85%\] of 3x \[=\left( \frac{60}{100}\times 2x \right)+\left( \frac{85}{100}\times 3x \right)=\frac{6x}{5}+\frac{51x}{20}=\frac{75x}{20}.\] \[\therefore \] Required percentage \[=\left( \frac{75x}{20}\times \frac{1}{5x}\times 100 \right)%=75%\]You need to login to perform this action.
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