The
mean
Class
weight of
in a
of 60 Students
40 kq
.The mean
weight of boys
is so kg and
giviš is 30 kg
find
the
murnber og
boys
girls.
in class
3
Answers
Answer:
Answer is 30
Step-by-step explanation:
Mean weight of 60 students= 40 kg
Mean weight of boys= 50kg
Mean weight of girls = 30 kg
Total weight of all the students is z
z/60= 40
z= 60 multiplies by 40
2400kgs
Now, let the number of boys be x.
Mean weight of boys is 50 kgs
Total weight of boys is 50x
Mean weight of girls is 30 kgs
Total weight of girls is 30(60-x)
2400= 50x + 30(60-x)
2400-1800= 20x
600/20= x
x= 30
The number of boys in the class is 30
The number of girls in the class is 60-30
which is 30.
PLEASE FOLLOW ME
Answer:
Let the no. of boys = x
no. of girls = 60-x
A/Q,
mean weight of boys = 50 kg
Total weight of boys ÷ x = 50
Total weight of boys = 50x
And, mean weight of girls = 30 kg
Total weight of girls ÷ (60-x) = 39
Total weight of girls = 30(60-x) = 1800 - 30x
Now,mean weight of 60 students = 40 kg
(Weight of girls + Weight of boys) ÷ total no. of students =40.
And now substitute u will get answer as 30 boys and girls. Hope it helps you plz plz mark as brainiliest.