Question

the average weight of a kid in a group of 10 is 35 kilograms.when sonu also joined them,the average became 36 kg.how much does sonu weigh??

Answer 1

hope it helps friend .. sonu weight is 46 kg

Answer 2

Answer:

46 kg

Step-by-step explanation:

The average weight of a kid in a group of 10 is 35 kilograms.

$Mean = \frac{\text{Sum of weights of 10 kids}}{\text{No. of kids}}$

$35= \frac{\text{Sum of weights of 10 kids}}{10}$

$35 \times 10= \text{Sum of weights of 10 kids}$

$350= \text{Sum of weights of 10 kids}$

Now we are given that Sonu also joined them,the average became 36 kg.

So, No. of students = 10+1 =11

So, $36= \frac{\text{Sum of weights of 11 kids}}{11}$

$36 \times 11= \frac\text{Sum of weights of 11 kids}$

$396= \frac\text{Sum of weights of 11 kids}$

Sonu's Weight = Sum of weights of 11 kids -Sum of weights of 10 kids

Sonu's Weight = 396-350

Sonu's Weight = 46

Hence the weight of Sonu is 46 kg.