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| 2017/07/04 08:44:44瀏覽90｜回應0｜推薦0 | |
| 標題: Mathematics 發問: Test 1 78 Test 2 62 Test 3 ? Test 4 72 Test 5 76 Average 7? Given the full mark is 100, estimate the possible range if the average mark if the mark is corrected to the nearest integer. 最佳解答:
此文章來自奇摩知識+如有不便請留言告知 If the avaerage mark is 70, Test 3 mark = 70x5 - 78 - 62 - 72 - 76 = 62 If the avaerage mark is 80, Test 3 mark = 80x5 - 78 - 62 - 72 - 76 = 112 (> full mark 100) so, if Test 3 mark = 100, the average mark is (78 + 62 + 100 + 72 + 76)/5 = 77.6 = 78 (corrected to the nearest integer) So the possible range of the average mark is 70~78. (with Test 3 mark range 62 ~ 100)其他解答: |
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