Answer:
88 score.
Step-by-step explanation:
Given:
To get a B in math, Alexandria Pappas must average 80 on five tests.
Scores on the first four tests were 82, 74, 82, and 74.
Question asked:
What is the lowest score that she can get on the last test and still get a B?
Solution:
Let lowest score she can get on the last test = [tex]x[/tex]
As we know:
[tex]Average=\frac{Sum\ of \ observations}{Number\ of\ observations}\\ \\ 80=\frac{82+74+82+74+x}{5} \\ \\[/tex]
By cross multiplication:-
[tex]80\times5=312+x \\ \\400=312+x\\Subtracting\ both\ sides\ by\ 312\\400-312=312-312+x\\88=x[/tex]
Thus, she can get 88 score on the last test to get a B in math.