Question

If the mean of $x,x+2,x+4,x+6$ and $x+8$ is $1$, what is the average of the last three numbers?

• A. 3
• B. 1
• C. 4
• D. 5

Answer 1

Answer: (A)

3

Mean of $x,x+2,x+4,x+6$ and $x+8$ is $1$

so, $\frac{x+x+2+x+4+x+6+x+8}{5}=1$

$⟹x=-3$

Hence Last three numbers are $1,3,5$

Average$=\frac{1+3+5}{3}=3$