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2024-02-05 22:03:58
2024-02-05 21:43:20
Giả sử tất cả đều là tàu lớn , vậy số ngư dân trên tàu tất cả là :
45 x 18 = 810 ( ngư dân )
Số ngư dân thừa ra là :
810 - 789 = 21 ( ngư dân )
Khi thay 1tàu bằng 1 tàu bé , tổng số ngư dân giảm là :
18 - 15 = 3 (ngư dân )
Số tàu bé cần thay là :
21 : 3 = 7 ( tàu )
Số tàu lớn là :
45 - 7 = 38 ( tàu )
Đáp số : 38 tàu