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Q.

Find the mean of the first 10 natural numbers.


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a

4.5

b

5.5

c

6.5

d

8.5 

answer is B.

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Detailed Solution

Given first 10 natural numbers.
The first 10 natural numbers are 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.
The expression for mean method is given as x ¯ = ∑ x i n   where x i   are the values and n is the number of terms.
So, n=10.
We get,
x ¯ = 1+2+3+4+5+6+7+8+9+10 10 ⇒ x ¯ = 55 10 ⇒ x ¯ =5.5  
Thus, the mean of the data is 5.5.
Therefore, option (2) is correct.
 
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