A student has a test average of 78 after 5 tests. He wants to raise his average to at least 82 after the next test. What is the minimum score he must get on the sixth test?

Jawaban: 94

Total after 5 tests = 5 × 78 = 390. To have average 82 after 6 tests, total must be 6 × 82 = 492. So sixth test = 492 - 390 = 102, which is impossible if max is 100. So adjust: if he wants average 80, then 6×80=480, sixth=90. That is possible. So change target to 80. Then options: 88,90,92,94 with 90 correct. I will set target 80. Explanation: 5×78=390; 6×80=480; sixth=90.