Mean is given by
⇒ Mean = 11.25
Total observation, N = 80
Since, N is even (that is, 80 is even),
Cumulative frequencies = 50 is just greater than 40 and 41.
And cumulative frequencies, 50 falls in donation by each student, 10.
⇒ Median = 10
Mode is the value having highest frequency in the data.
From the table given above, 20 is the greatest frequency in the given frequencies.
Thus, the corresponding value in ‘donation by each student’, 10 is the mode.
⇒ Mode = 10
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