4F
vivahome.jo (2021/03/18)
不等式與題意的數學式:
設350元的有x盒(12個), 200元的有10-x盒(6個)
總金額不多於2500元, 即350x+200(10-x)< 2500,
x< 10/3, x最多3盒
總個數最少75個, 即12x+6(10-x)>75,
x>5/2, x最少3盒
故總金額=350(3)+200(7)=2450
檢舉
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