Question

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%?

Answer 1

(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