the mean weight of 150 students is 30kg .the mean we of boys is 40kg and girls is 25kg .find the number of girls and boys in the class
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total weight= 150 × 30 = 4500
mean we of boys= 40
let there be n boys
so there total weight will be 40n
and the no of girls will be 150- n
so there total weight will be 150-n × 25= 3750-25n
so 3750-25n + 40n =4500
so n would be 50
so no of girls would be 150-50= 100
plz markit as brainliest
mean we of boys= 40
let there be n boys
so there total weight will be 40n
and the no of girls will be 150- n
so there total weight will be 150-n × 25= 3750-25n
so 3750-25n + 40n =4500
so n would be 50
so no of girls would be 150-50= 100
plz markit as brainliest
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