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30 boys with an average weight of 60 kgs and 20 girls with an average weight of 40.
Find the average weight of the whole class?
Find the average weight of the whole class?

A.30
B.52
C.46
D.38
Answer and Feedback
Answer:B
Feedback:To find the answer to the above question, one can use the formula for the weighted average.
Suppose the question was framed a bit differently, the Average weight of boys is 60, the average weight of girls is 40 and average weight of the whole class is 52.

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Practice Mixtures and Alligations Online Test 3 | Englishfreetest.com

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