NCHMCT JEE 2020 Question Paper with solutions for online practice

Question : 77 of 200

Marks: +1, -0

Average of first five odd multiples of 3 is

Solution:

Average of first five odd multiples of 3

\;\; =\;{3+9+15+21+27}/{5}

\;\; =\;{3(1+3+5+7+9)}/{5}

\;\; =\;{3 × 25}/{5}=15

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