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The donations given to an orphanage home by the students of different classes of a secondary school are given below.

Class Donation by each student in (Rs) No. of students donated
VI 5 15
VII 7 15
VIII 10 20
IX 15 16
X 20 14

Find the mean, median and mode of the data.

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Σfi = 80 

Σfi xi = 900

Mean \(\overline x = \frac {\sum f_ix_i}{\sum f_i} = \frac {900}{80} = 11.25\)

Median = Average of (N/2) and (N/2 +1) terms of 80/2, (80/2 + 1) terms.

= average of 40 and 41 terms = ₹10

Mode = ₹ 10

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