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 Moderate · 45s
Compute weighted mean of marks 80, 70, 60 with weights 4, 3, 3.
TopicStatistics
Question Typemultiple choice
DifficultyModerate
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
Weighted mean = Σ(wx)/Σw = 71.00.
Final Answer: Option B - 71.00