Find the mean of the first seven prime numbers.

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Solution

Finding the mean of the first seven prime numbers.
The first seven prime numbers are $2, 3, 5, 7, 11, 13, 17$
$A r i t h m e t i c m e a n = \frac{S u m o f a l l o b s e r v a t i o n s}{t o t a l n u m b e r o f o b s e r v a t i o n s}$
the mean of the first seven primes $= \frac{2 + 3 + 5 + 7 + 11 + 13 + 17}{7}$
$= \frac{58}{7} = 8 \frac{2}{7} .$
Hence the mean of the first seven prime is $8 \frac{2}{7}$

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