In a class of 40 students, 45% are girls and the remaining are boys. If the average of the girls’ marks is 54 and that of the boys is 46, what is the average of the whole class?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 49.6
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Application |
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Total students = 40 Number of girls in class = 40 × 45/100 = 18 Number of boys in class = 40 - 18 = 22 Average marks of girls = 54 Average marks of boys = 46 Sum of marks of girls is = 54 × 18 = 972 Sum of marks of boys is = 46 × 22 = 1,012 Total sum of marks of all class = 1,012 + 972 = 1984 Average marks of whole class = 1984/40 = 49.6 |