JEE Main 2012 — Statistics Question with Solution
JEE Main 2012 (19 May Online)
Question
The median of 100 observations grouped in classes of equal width is 25 . If the median class interval is 20-30 and the number of observations less than 20 is 45 , then the frequency of median class is
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Show full solutionCorrect option: A
Correct answer
A10
Step-by-step explanation
Median is given as
where
lower limit of the median - class
frequency of the median class
total frequency
cumulative frequency of the class just before the median class
length of median class
Now, given, , .
By using formula, we have
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This is a previous-year question from JEE Main 2012, covering the Statistics chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.