Math, asked by sweet7189, 1 year ago

Find the arithmetic mean of first 20 natural numbers​

Answers

Answered by Anirban1108
2

Mean = (1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20)/20

n(n+1)/2

20(21)/2

210/20

10.5

Answered by Agnishupadhyay
1
We need to find out sum of first 20 natural numbers
Which is given by
(n)(n+1)/2
= 20*21/2

Now for average divide by 20

Average = 20*21/2*20

= 10.5
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