Question

The mean weight of 100 students in a class is 46 kg. The mean weight of the boys is 50kg and the girls 40 kg . Find the number of boys in the class

Answer 1

Step-by-step explanation:

Let there is x number of boys in the class.

then no. of girls = 100-x

total weight of students = 100×46=4600

total weight of boys = 50x

total weight of girls = 40×(100-x) = 4000-40x

according to the question, we get

total weight => 50x+4000-40x = 4600

=> 10x=4600-4000

=> x=500/10

=> x= 50

So, no of boys in the class= 50

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Answer 2

Step-by-step explanation:

50 answer

hope it helps you