JEE Main 2018 — Statistics Question with Solution
JEE Main 2018 (15 Apr Shift 1 Online)
Question
The mean of a set of 30 observations is 75 . If each other observation is multiplied by a nonzero number and then each of them is decreased by 25 , their mean remains the same. The is equal to
equal to
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
As mean is a linear operation, so if each observation is multiplied by and decreased by 25 then the mean becomes 75 .
According to the question,
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This is a previous-year question from JEE Main 2018, 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.