2+3+5+7+11+13+17+19+23+29 = 129
The average is 12.9
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The average of the first ten prime numbers is 12.9.
The first four prime numbers greater than 10 are , 11, 13,17,19 Their mean is (11 + 13 + 17 + 19) / 4 = 15 NB '15' is NOT a prime number.
2,3,5,7,11,13,17,19,23,29- that's the first 10
The sum of the first 10 natural numbers is 51, with an average of 5.1
10 does not have 6 prime numbers.