Q. 84.5( 21 Votes )

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Answer :

Here, we can find mean by either direct or assumed mean method. Let’s find mean of the data using direct method as data given have smaller values.

First, construct a table for ease of calculation.



Mean is given by



Mean = 1961/40


Mean = 49.025


Or approximately, mean = 49


Thus, mean number of days a student was present is 49.


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