Find the missing frequency 'f' in the following table, if the mean of the given data is 18 . Hence find the mode.

CBSE Class 10 Maths PYQ · Statistics · Find Freuency · 5 Marks · March 2025 · Standard

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815 Marks · March 2025 · Standard

Find the missing frequency 'f' in the following table, if the mean of the given data is $18$. Hence find the mode.

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Correct table. Mean $= \frac{752 + 20f}{44 + f} = 18 \implies f = 20$. Modal class $19 - 21$. Mode $= 19 + \frac{20 - 13}{40 - 13 - 5} \times 3 = 19.95$ approx.