find the mean of six natural numbers
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Sn= n/2(2a+(n-1)d)
= 6/2(2(1)+(6-1)1)
=3(2+5)
= 3(7)=21
mean = total / total number
= 21/6 = 7/2= 3.5
= 6/2(2(1)+(6-1)1)
=3(2+5)
= 3(7)=21
mean = total / total number
= 21/6 = 7/2= 3.5
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