Average of consecutive numbers is n . If next two consecutive numbers are also included, average of

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4.Average

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The average of consecutive numbers is $n .$ If the next two consecutive numbers are also included, the average of the five numbers will

A

remain the same

B

increase by $0.5$

C

increase by $1$

D

increase by $1.5$

Solution

Let, the numbers be $n-1, n$ and $n+1$. Their average

$=n$

The next two consecutive numbers are $n+2$ and $n+3$.

Therefore, the average of the five numbers

$=\frac{(n-1)+n+(n+1)+(n+2)+(n+3)}{5}$

$=\frac{5 n+5}{5}$

$=n+1$

Standard 13

Quantitative Aptitude

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