Tyrece's quarter grade in Science is calculated by finding his mean test score for that quarter. So far this quarter, Tyrece has taken three tests and scored 68, 83, and 74. He wants to earn an 80 for the quarter and has his last test on Friday.

What grade does Tyrece need to earn on his last test so that he will have an 80 for the quarter?

A. 25
B. 80
C. 95
D. 100

Question

Tyrece's quarter grade in Science is calculated by finding his mean test score for that quarter. So far this quarter, Tyrece has taken three tests and scored 68, 83, and 74. He wants to earn an 80 for the quarter and has his last test on Friday.

What grade does Tyrece need to earn on his last test so that he will have an 80 for the quarter?


	A.	25	
	B.	80	
	C.	95	
	D.	100

anonymous · Answer

Those 3 grades  count for 75% of his entire grade.  The sum of those three scores is 225. If he wants an 80 for the quarter, he'd need a total of 320 points over four tests. 
320-225 = 95 :)

anonymous · Answer

thx :):):)