Question 659751
Average = total scores/number of test taken
84 = (96 + 68 + 79 + 85 + x) / 5
84*5 = (96 + 68 + 79 + 85 + x)/5 * 5
420 = 96 + 68 + 79 + 85 + x
420 = 328 + x
420 - 328 = 328 + x - 328
92 = x