Question

When a player weighing 45 kg is replaced by another player in team of 20 players, the average increases by 2.5 kg, find weight of new player ​

Answer 1

Answer:

Total weight increased = (8 x 2.5) kg = 20 kg. Weight of new person = (65 + 20) kg = 85 kg.

Step-by-step explanation:

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Answer 2

Answer:

Explanation:

Total weight increased = (8 x 2.5) kg = 20 kg.

Weight of new person = (65 + 20) kg = 85 kg.

Step-by-step explanation:

Let x be the average weight

First case: Sum of weights of people / 8 people = x

So the sum of weights of people = 8x

Second case: Sum of weights of people / 8 people = x + 2.5

So the sum of weights of people here is 8(x + 2.5) = 8x + 20

So the difference between both sums is essentially the new heavier person that was added which is:

8x + 20 - 8x = 20

So the new guy weights 20kg more than the old guy.

So new guy weights: 65 + 20 = 85kg