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Mean of Ungrouped Data

Find the mean...

Question

Find the mean of the following data.
pocket expenses: $455060758095100$
No. of student: $108612356$

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Solution

Mean of the data is
$\frac{45 \times 10 + 50 \times 8 + 60 \times 6 + 75 \times 12 + 80 \times 3 + 95 \times 5 + 100 \times 6}{10 + 8 + 6 + 12 + 3 + 5 + 6} = \frac{450 + 400 + 360 + 900 + 240 + 475 + 600}{50} = \frac{3425}{50} = 68.5$

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