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Cube Root of a Cube Number Using Estimation

Find the mean...

Question

Find the mean of the squares of the first seven whole numbers?

A

10

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B

13

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C

50

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D

91

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Solution

The correct option is B
13

$M e a n = \frac{s u m o f o b s e r v a t i o n s}{n u m b e r o f s t u d e n t s}$
$= \frac{(0 + 1 + 4 + 9 + 16 + 25 + 36)}{7}$

mean = 13

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Cube Root of a Cube Number Using Estimation

Standard VIII Mathematics

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