Question 50

In a class there were 18 boys and some girls. In a test the mean score obtained by the boys was 12 while that obtained by the girls was 14. lf the overall average was 13.1, what was the total number of students in the class?

Solution

b=12,g=14(value of b and g , from question)

$$\ \ \ \frac{\ 18b+xg}{18+x}$$=13.1,

x is the number of girl =12

total boys and girls =18+12=40;

hence option 'D' is correct.

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