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In an exam, the marks obtained by 10 students are as follows:
25, 21, 20, 28, 26, 30, 15, 24, 27, 29
What will be the mean?

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25.5

24.5

answer is B.

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Detailed Solution

Concept: Central tendency is a measure with (Mean, Mode, and Median)

The average of the given number of observations is called the mean.

Mean of the given observations is:

$M e a n = \frac{S u m o f o b s e r v a t i o n s}{N u m b e r o f o b s e r v a t i o n s}$

Therefore,

$M e a n = \frac{25 + 21 + 20 + 28 + 26 + 30 + 15 + 24 + 27 + 29}{10}$

$\Rightarrow \frac{245}{10} = 24.5$

$∴ M e a n = 24.5$

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