Answers

2016-02-24T16:56:28+05:30
Mean=7+11+13+17+19÷5=67/5
=13.4
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2016-02-24T17:05:44+05:30
The mean i.e average of prime numbers between 6 to 20 is 
prime numbers 6 to 20 =7,11,13,17,19
average = sum/no of data
ans = 67/5
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