1. the no. of students present in a class on first five days r 39 ,43,41,45,42. the average presence on any day.... experts please ans dis que...its urgent i have exams..

mean=sum of observation /no.of observation

so, (39+43+41+45+42)/5=210/5=42 is the average.

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39+43+41+45+42= 210

= 210/5

= 42

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as u know, mean or arithematic mean =sum of all the observations/no of observations

=39+43+41+45+42/5

=210/5

=42

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thanz a lot..

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ur welcome

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