the mean weight of 60 students In a class is 40 kg .the mean weight of boys is 50 kilogram while that of girls is 30 kg .find the number of boys and girls in the class
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2
Answer:
30 boys and 30 girls
Step-by-step explanation:
mean weight of 1boy = 50kg
mean weight of one girl= 30kg
mean weight of 1 boy and 1 girl =50+30/2 = 40kg =mean weight of whole class
so girls and boys are in same ratio
let no. of boys be X then no. of girls =X
x+X=60
x=30
so there are 30 boys and 30 girls
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Answered by
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Answer:
boys =30 and girls =30
Step-by-step explanation:
mean =60*40=2400
no. of boys weight +no of girls weight÷2
50+30÷2=40
therefore they are in the same ratio by this we can say :
boys =30 and Girls=30
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