JEE Main 2015MathematicsStatisticsEasyMCQ

JEE Main 2015 — Statistics Question with Solution

JEE Main 2015 (10 Apr Online)

Question

A factory is operating in two shifts, day and night, with 70 and 30 workers, respectively.If per day mean wage of the day shift workers is, ₹54 and per day mean wage of all the workers is ₹60, then per day mean wage of the night shift workers (in ₹) is :

Choose an option

Show full solutionCorrect option: B
Correct answer
B74

Step-by-step explanation

n1 x¯1  +n2 x¯2n1+n2 = x¯

70⋅54+30 x¯270+30=60

⇒3780+30 x¯2 =6000

∴   x¯2= 6000-378030

= 222030

=74

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About this question

This is a previous-year question from JEE Main 2015, 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.