Math, asked by hetavshah21, 1 year ago

The mean weight of 180 students in a school is 50 kg. The mean weight of boys is 60 kg and that of girls is 45 kg. Find the number of boys and girls.

Answers

Answered by Anonymous
16

SOLUTION:

Total student's in class =180

Mean weight=50kg

Total weight=180×50=9000kg.

Let the total no. of boys=x

Mean weight of boys=70x kg

Total no. of girls=Total student-Number of boys=180-x

Mean weight of girls=45kg

Total weight of girls=45×(180-x)=8100-45x kg

Total weight= weight of boys+weight of girls

9000=70x+(8100-45x)

9000=70x+8100-45x

9000-8100=70x-45x

900=25x

x=900÷25

x=36

Now, No. of boys= 36

Number of girls=180-36=144 ANS...




Answered by adiazmina5a
5

Answer:no of boys = 60

No of girls = 120

Step-by-step explanation:

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