SOLUTION: I've did this problem many times but I think I keep getting a wrong answer.
A student has scores of 85, 64, and 72 on three exams. What are the possible scores the student would
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Question 919429: I've did this problem many times but I think I keep getting a wrong answer.
A student has scores of 85, 64, and 72 on three exams. What are the possible scores the student would need to earn on the fourth exam to have at least an average of 75 on the four exams?
Found 2 solutions by ewatrrr, rothauserc:
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
x ≥ 300 - (85+64+72)
x ≥ 79
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
let x represent the score on the fourth exam, then
(85 + 64 + 72 + x) / 4 > or = 75
(85 + 64 + 72 + x) > or = 300
221 + x > or = 300
x > or = 79
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