Twenty‐five students in a class take a test for which the average grade is 75. Then a twenty‐sixth student enters the class, takes the test, and scores 80. The test average calculated with 26 students will
A) rise above 75.
B) fall below 75.
C) change from 75 but the direction is unclear.
D) still equal 75.

Question

Quizplus · Accepted Answer

The average score increases because the twenty-sixth student's score of 80 is higher than the original average of 75, raising the overall average.

Twenty‐five Students in a Class Take a Test for Which