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you get a 90%, 75% and 80% on your practices. There is one more practice before the test. What score do you need on the fourth practice to get an average of 85%?
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you get a 90%, 75% and 80% on your practices. There is one more practice before the test. What score do you need on the fourth practice to get an average of 85%?

User Till Helge
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4 votes
(90 + 75 + 80 + x) / 4 = 85
(245 + x) / 4 = 85
245 + x = 85 * 4
245 + x = 340
x = 340 - 245
x = 95 <=== u need a 95
User Frank Krueger
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