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Mean for an Ungrouped Data

Find the mean...

Question

Find the mean of 17,21,12,5,3,2.

A

18

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B

20

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C

5

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D

10

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Solution

The correct option is D 10
Formula:
Mean = $\frac{S u m o f a l l o b s e r v a t i o n s}{T o t a l n u m b e r o f o b s e r v a t i o n s}$

= $\frac{17 + 21 + 12 + 5 + 3 + 2}{6}$
= $\frac{60}{6}$
= 10

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