There are two divisions A and B of a class, consisting of 35 and 45 students respectively. If the average weight of divisions A is 50 kg and that of division B is 65 kg, what is the average weight of the whole class?

56.30

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57.35

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58.43

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59.00

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59.59

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Solution

The correct option is C
58.43

Average weight of the whole class= $\frac{35 \times 50 + 45 \times 65}{80} = 58.43$

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There are two divisions A and B of a class, consisting of 35 and 45 students respectively. If the average weight of divisions A is 50 kg and that of division B is 65 kg, what is the average weight of the whole class?

The correct option is C 58.43 Average weight of the whole class=35×50+45×6580=58.43

The correct option is C
58.43

Average weight of the whole class= $\frac{35 \times 50 + 45 \times 65}{80} = 58.43$