<PRE><B>Question 935177</B>
After three 25-point quizzes, you have 58 points.
How many points do you need to score on your next 25-point quiz to have a mean score of 20 points?
let x = your score on the 4th quiz
{{{(58 + x)/4}}} = 20
58 + x = 20*4
x = 80 - 58
x = 22
:
Would a mean score of 20 points after 4 quizzes be greater than or less than your mean score after 3 quizzes?
58/3 = 19.333, more
:
Your score on each quiz is a whole number.
 Is it possible that your mean score does not change after the fourth quiz? Explain. No, the 4th score average will be an in integer, since the total of the first 3 scores is 58, an integer</PRE>