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Statistics · UPSC CDS/OTA · Question 12 of 33

Statistics : For values x:10,20,30,40,50 with frequencies 3,5,_,4,2 the mean is 28. Find the missing frequency.

Step-by-step solution. Statistics for UPSC CDS/OTA.

Topic
Statistics
Subject
Mathematics
Difficulty
Difficult
Solve Time
45-60 sec

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Q · Statistics Difficult · 45s

For values x:10,20,30,40,50 with frequencies 3,5,_,4,2 the mean is 28. Find the missing frequency.

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.

Mean = (Σfx)/(Σf) ⇒ (390+30m)/(14+m)=28 ⇒ m=1.

Final Answer: Option A - 1
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For values x:10,20,30,40,50 with frequencies 3,5,_,4,2… - Statistics (Mathematics) Solved Question