400 * 0.79 = 316
64 + 77 + 82 = 223
316 - 223 = 93
Pablo has scored 64, 77, and 82 on his previous three tests. What score does he need on his next test so that his average (mean) is 79?
2 answers
Kira has scored 61, 80, and 88 on her previous three tests. What score does she need on her next test so that her average (mean) is 77?