Jill has received 8 of her 12 evaluation scores. So far, Jill’s average (arithmetic mean) is 3.75 out of a possible 5. If Jill needs an average of 4.0 points to get a promotion, which set of scores will allow Jill to receive her promotion? Indicate all possible answers.
A.3.0, 3.5, 4.75, 4.75
B.3.5, 4.75, 4.75, 5.0
C.3.25, 4.5, 4.75, 5.0
D.3.75, 4.5, 4.75, 5.0
我的答案:
Jill has received 8 of her 12 evaluation scores. So far, Jill’s average (arithmetic mean) is 3.75 out of a possible 5. If Jill needs an average of 4.0 points to get a promotion, which set of scores will allow Jill to receive her promotion?