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 · Data InterpretationMedium · 45s
The following pie chart shows the percentage-wise distribution of the number of students of five different schools P, Q, R, S, T. The total number of students in all schools together is 8400. Find the average number of students in schools R and S together.
TopicData Interpretation
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
Number of students in school R = 14/100 × 8400 = 1176
Number of students in school S = 22/100 × 8400 = 1848
Required average = (1176 + 1848)/2 = 1512
Final Answer: Option B — 1612