what must be your 4th grade to have an average of 75,if your grades are 72, 74 and 75?
a.76
b.77
c.78
d.79
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what must be your 4th grade to have an average of 75,if your grades are 72, 74 and 75?
a.76
b.77
c.78
d.79
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Answer:
D. 79
Step-by-step explanation:
Just count how much more you need to raise values below 75 to get to 75
72 needs 3 more, 74 needs 1 more
So 75 + 3 + 1 = 79
79 must be your fourth grade to get an average of 75.
Check:
(72 + 74 + 75 + 79) / 4 = 75
Answer:
D. 79
Step-by-step explanation:
72 + 74 + 75 + 79 = 300
300÷4= 75