Question

Which of the following represents "the average of 171 and x"?

(x + 2)/171
(171 + x)/2
(171 - x)/2

Answer 1

that would be (171 + x) / 2....what u do to find the average is add up all the numbers, then divide by how many numbers there are.

Answer 2

Answer:
`\frac{\text{171+x}}{\text{2}}`

Explanation:

We know that the average of any n observations is given by :-

`\text{Average}=\frac{\text{Sum of observations}}{\text{Number of observations}}`

The given observations : x and 171

Sum of observations :
`x+171`

Number of observations : 2

Now, the average of 171 and x is given by :-

`\text{Average}=\frac{\text{171+x}}{\text{2}}`

Hence, the expression represents the average of 171 and x is
`\frac{\text{171+x}}{\text{2}}`.