Question

the average weight of 6 boys gets increased by 5 kg if a boy with weight 20 kg is replaced by a new boy what is the weight of new boy

Answer 1

Let the total weight be x.
Then, weight of new boy is x-5=20Kg
=> x=25Kg

Answer: Weight of the new boy is 25Kg

Answer 2

The weight of new boy is 50 kg.

Step-by-step explanation:

Let the average weight of 6 boys be 'x'.

$\dfrac{\sum x}{6}=x\\\\\sum x=6x$

It is increased by 5 kg.

So, new weight = x+5

According to question,

$6\times 5+20\\\\=30+20\\\\=50$

Hence, the weight of new boy is 50 kg.

# learn more:

the average weight of 6 boys gets increased by 5 kg if a boy with weight 20 kg is replaced by a new boy what is the weight of new boy

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