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
Find the 70th percentile (P₇₀) using nearest-rank method for data: 22, 25, 27, 30, 35, 40, 42, 45.
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.
n=8 ⇒ k=ceil(0.70×8)=ceil(5.6)=6 ⇒ P₇₀ is 6th value = 40.
Final Answer: Option A — 40