Question

there are 45% girls in class and reamining are the boys . what persantage of the boys​

Answer 1

Step-by-step explanation:

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=180.45×40=18

Number of boys = 40-18=2240−18=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

40

18×54+22×46

=

40

972+1012

=

40

1984

=49.6

Hence, the average of the whole class is 49.6.

Answer 2

total percent is 100

no. of girls = 45 %

no. of boys = ?

now your solution mate ,

total % - girls % = boys %

100% - 45 % = 55%

so , no. of boys = 55%

hope it's help ✌✌