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The mean weight of 8 numbers is 15. If each number is multiplied by 2, what will be the new mean?
Given:
The mean weight of 8 numbers is 15.
Each number is multiplied by 2.
To do:
We have to find the new mean.
Solution:
We know that,
Mean $\overline{X}=\frac{Sum\ of\ the\ observations}{Number\ of\ observations}$
Weight of 8 numbers $=15$
Each number is multiplied by 2.
This implies,
New mean $= 15 \times 2$
$= 30$
Hence, the new mean is 30.
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