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The mean of first ten odd natural numbers is 

A) 19 

B) 10

C) 20 

D) 5

2 Answers

+1 vote
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Best answer

Correct option is (B) 10

First 10 odd natural numbers are 1, 3, 5, ......., 19.

\(\therefore\) Mean of first ten odd natural numbers \(=\frac{1+3+5+....+19\,(odd)}{10}\)

\(=\frac{(1+19)+(3+17)+(5+15)+(7+13)+(9+11)}{10}\)

\(=\frac{5\times20}{10}\) = 10

Hence, the mean of first ten odd natural numbers is 10.

+1 vote
by (42.4k points)

Correct option is  B) 10

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