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Mean for an Ungrouped Data

Find the mean...

Question

Find the mean of 56,34,89,13.

A

18

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B

58

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C

28

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D

48

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Solution

The correct option is D 48
Formula:
Mean = $\frac{S u m o f a l l o b s e r v a t i o n s}{T o t a l n u m b e r o f o b s e r v a t i o n s}$

= $\frac{56 + 34 + 89 + 13}{4}$
= $\frac{192}{4}$
= 48

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