Question 71

The Table given below shows the number of students having obtained different marks.

What is the mean marks per student?

Solution

Required mean

= $$\frac{10 \times 6 + 12 \times 5 + 14 \times 2 + 16 \times 2 + 18 \times 5 }{20}$$ = 13.5

So , the answer would be option a)13.5

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