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The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.

147.55 kg
248 kg
348.55 kg
449.25 kg

Answer:- 1

Explanation:-

Solution:

\begin{aligned} ∴ Required average \\ = (\frac{50.25 \times 16 + 45.15 \times 8}{16 + 8}) \\ = (\frac{804 + 361.20}{24}) \\ = \frac{1165.20}{24} \\ = 48.55 \end{aligned}

$\eqalign{ & \therefore {\text{Required}}\,{\text{average}} \cr & = \left( {\frac{{50.25 \times 16 + 45.15 \times 8}}{{16 + 8}}} \right) \cr & = \left( {\frac{{804 + 361.20}}{{24}}} \right) \cr & = \frac{{1165.20}}{{24}} \cr & = 48.55 \cr}$

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", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" } }, "suggestedAnswer": { "@type": "Answer", "text": "

Solution:

\begin{aligned} ∴ Required average \\ = (\frac{50.25 \times 16 + 45.15 \times 8}{16 + 8}) \\ = (\frac{804 + 361.20}{24}) \\ = \frac{1165.20}{24} \\ = 48.55 \end{aligned}

$\eqalign{ & \therefore {\text{Required}}\,{\text{average}} \cr & = \left( {\frac{{50.25 \times 16 + 45.15 \times 8}}{{16 + 8}}} \right) \cr & = \left( {\frac{{804 + 361.20}}{{24}}} \right) \cr & = \frac{{1165.20}}{{24}} \cr & = 48.55 \cr}$ ", "dateCreated": "7/24/2019 10:09:12 AM" } }

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