Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Statistics Difficult · 45s
Find the mode for grouped data with classes 0–10,10–20,20–30,30–40,40–50 and frequencies 6,14,20,10,4.
TopicStatistics
Question Typemultiple choice
DifficultyDifficult
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
Mode ≈ L + [(f₁−f₀)/(2f₁−f₀−f₂)]·h = 23.75.
Final Answer: Option A - 23.75