The average weight of 16 boys in a class is 50.25 and that of the remaining 8 boys is 45.25. What is the average weight of the class, including the teacher, if the teacher weighs 59 Kg.

48.58

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48.75

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48.8

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49.2

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Solution

The correct option is D 49
Sum total of weights of students and teacher $= (16 \times 50.25) + (8 \times 45.25) + 59 = 1225$
Average weight $= \frac{1225}{25} = 49$

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The average weight of 16 boys in a class is 50.25 and that of the remaining 8 boys is 45.25. What is the average weight of the class, including the teacher, if the teacher weighs 59 Kg.

The correct option is D 49Sum total of weights of students and teacher =(16×50.25)+(8×45.25)+59=1225 Average weight =122525=49

The correct option is D 49
Sum total of weights of students and teacher $= (16 \times 50.25) + (8 \times 45.25) + 59 = 1225$
Average weight $= \frac{1225}{25} = 49$