In a class, the average marks of girls in an examination are 75, and those of the boys are 64. The average score of the whole class is 68.4. What is the percentage of girls in the class?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 40%.
Let the number of girls = G, boys = B
Girls : Total = 2 : (3 + 2) = 2 : 5
Girls% = × 100 = 40%