Question

the average weight of a child in a group of 10 is 30 kg .when Kiran also joined the group the average become 35 kg.how much does Kiran weight?​

Answer 1

Answer:

5 kg

Step-by-step explanation:

The average weight of child in a group - 30kg

Kiran joined and became - 35kg

so,

35kg - 30kg

= 5kg.

Therefore, Kiran weighs 5kg.

Answer 2

Given - Average weight

Find - Weight of Kiran

Solution - Weight of Kiran is 85 Kilograms.

The formula for average weight is -

Sum of all weights/Total number of children = Average weight

In the case, when 10 children are there-

Sum of all weights = 30*10

Sum of all weights = 300 kilograms

When 11 children are there-

Sum of weights + Weight of Kiran/11 = Average weight

300 + Weight of Kiran = 35*11

300 + Weight of Kiran = 385

Weight of Kiran = 385 - 300

Weight of Kiran = 85 kilograms

Thus, Kiran weighs 85 kilograms.