Question:
Find the mean of first five multiples of 3.
Solution:
First five multiples of 3 are 3, 6, 9, 12, 15.
$\therefore$ Mean $=\frac{\text { Sum of numbers }}{\text { Total numbers }}$
$=\frac{3+6+9+12+15}{5}=\frac{45}{5}$
= 9
Mean = 9
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