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2014-03-07T15:42:07+05:30

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Those no. which can be only divided by itself or 1 are called prime no.
the first 10 prime no. are
2  3   5   7  11  13  17  19  23   29
mean=2+3+5+7+11+13+17+19+23+29/10
=12.9
4 4 4
2014-03-07T15:42:59+05:30

This Is a Certified Answer

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
First 10 prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29
sum of these numbers are 2+3+5+7+11+13+17+19+23+29 = 129
therefore, mean = sum of observation / no. of observation
                        = 129/10 = 12.9
1 1 1
1st10 prime numbers _ 2, 3, 5, 7, 11, 13, 17, 19, 23, 29
sum of these nos _ 2+3+5+7+11+13+17+19+23+29 = 129
mean = sum of observation / number of observation
= 129/10 = 12.9