Answers

2016-04-19T11:23:35+05:30
First five prime nos. = 2,3,5,7,11
mean=average
=   (2+3+5+7+11) / 5
=28 /5 
=5.6
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2016-04-19T11:24:20+05:30
The first five prime numbers are:: 2,3,5,7,11.
mean- number of observations/total observations.
==2+3+5+7+11/5
=  28/5
=5.6.
mean=5.6

hope this helps u. 
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