Question

Ina 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?

Answer 1

Answer:

54+46:x

Step-by-step explanation:

x are 20%ok

And 45% are y

Answer 2

The average of the whole class is 49.6.

Step-by-step explanation:

Since we have given that

Number of students = 40

Number of girls = $0.45\times 40=18$

Number of boys = $40-18=22$

Average marks of the girls = 54

Average marks of the boys = 46

So, the average of whole class would be

$\dfrac{18\times 54+22\times 46}{40}=\dfrac{972+1012}{40}=\dfrac{1984}{40}=49.6$

Hence, the average of the whole class is 49.6.

# learn more:

In a class 54% are girlsand 46% are boys.if the no. of girls is 27.find the total no. of students

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