Question

The average weight of 10 boys is 35 kg. If a new boy whose weight in 46 kg
joins the group, what will be their average weight?​

Answer 1

Answer:

36 kg

Step-by-step explanation:

Average weight of 10 boys = 35 kg

Total weight of 10 boys = 35(10) kg = 350 kg

Now we have add a new boy having weight 46kg

So the total no. of boys become 11

and total weight of 11 boys = (350 + 46) kg = 396kg

Average = Total weight of 11 boys / 11 boys

= 396/12 = 36 kg

Answer 2

Given: The average weight of 10 boys is 35 kg.

Need to find: Average weight of the group.

Now,

$\therefore$ Average of 10 Boys = 35 × 10

• Average = 350

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$\underline{\boldsymbol{According\: to \:the\: Question :}}$ ⠀⠀

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• Given weight of new Boy is 46 kg.

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Therefore,

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$:\implies\sf \dfrac{350 + 46}{11} \\\\\\:\implies\sf\dfrac{396}{11}\\\\\\:\implies\sf\cancel\dfrac{396}{11}\\\\\\:\implies{\underline{\boxed{\frak{\pink{36\; kg}}}}}\:\bigstar$

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$\therefore\:{\underline{\sf{Hence, \: their\: average\: weight\: will \: be \: \bf{36\;kg}.}}}$