CDS 2025 · PYQ · Statistics / Frequency Distribution · easy
The frequency distribution of 205 observations on X is given below: X: 3, 5, 6, 7 with frequencies f, f+2, f−3, f+6 respectively. What is the value of f?
A.50✓ Correct
B.60
C.70
D.80
Explanation
Sum of frequencies = f + (f+2) + (f−3) + (f+6) = 4f + 5 = 205. So 4f = 200, giving f = 50.
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