Maths problem： how to do, thanks?
回答 (1)
2020-10-09 12:00 am
✔ 最佳答案
Let n be the required number.Consider
(22 + 24 + n)/16 > (30 + 42 + 21)/24
(46 + n)/16 > 93/24
46 + n > 93/24 × 16
46 + n > 93/3 × 2
46 + n > 31 × 2
46 + n > 63
n > 63 - 46
n > 17
Therefore, at least 18 items Homeroom B needs to collect.
收錄日期: 2021-04-24 08:03:05
原文連結 [永久失效]:
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