The mean weight of 6 children is 35 kg.when a new boy joined the group, the mean weight becomes 36 kg .What is the weight of the new boy
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sayyedarifali:
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EXPLAINATION
mean=total weight/number of students
Let total weight = x
35=x/6
35*6=x
210=x
Therefore, x=210 kg
Let weight of mew boy = y
210+y/7=36(since a new boy joins total no. of students is7)
210+y=36*7
210+y=252
y=252-210
Y=42kg
Hence weight of new boy = 42kg
(/=division
*=multiplication)
Hope it’s helpful
mean=total weight/number of students
Let total weight = x
35=x/6
35*6=x
210=x
Therefore, x=210 kg
Let weight of mew boy = y
210+y/7=36(since a new boy joins total no. of students is7)
210+y=36*7
210+y=252
y=252-210
Y=42kg
Hence weight of new boy = 42kg
(/=division
*=multiplication)
Hope it’s helpful
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