Question

test scores the average test score in a class is 78%. half of the class scored within 8 points of the average. one student received a score of x%. which shows an expression that could be used to determine how far the student’s score is from the average?

a) 78 - |8|

b) |x - 78|

c) |x| - 78

d) |78 - 8|

Explanation:

Step1: Define distance from average

The distance between two values is their absolute difference.

Step2: Match to given values

Average = 78, student score = $x$. The absolute difference is $|x - 78|$.

Step3: Eliminate incorrect options

Options A, C, D do not represent the difference between $x$ and 78.

Answer:

B) $|x - 78|$