Question

find the Arithmetic mean of the following data
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Answer 1

Answer:   53.33

Step-by-step explanation:

This is a weighted average type question.

In this case,

Required mean= {[(5x70)+(65x10)+(15x60)+(20x55)+(25x40)]÷[5+10+15+20+25]}

                        = {(350+650+900+1100+1000)÷(75)}

                        = 4000÷75

                        = 53.33

Hence, for the given data the arithmetic mean is 53.33.