Question

32. The average weight of the group of boys and girls is 38 kg. The average
weight of the boys is 42 kg and that of the girls is 33 kg. If the number of boys
is 25, find the number of girls.​

Answer 1

Answer:

HEY!!!!

Step-by-step explanation:

Let number of girls

=

x

Total weight of boys

=

42

×

25

=

1050

Total weight of girls

=

33

x

Total weight of boys and girls

=

1050

+

33

x

---(1)

average weight of a group of boys and girls is 38 kg

=> Total weight of boys and girls

=

38

(

25

+

x

)

---(2)

From (1) and (2)

1050

+

33

x

=

38

(

25

+

x

)

1050

+

33

x

=

950

+

38

x

5

x

=

100

x

=

20