4 nguoi cong nhan lap rap dc 200 chiec may . Trong do ,nguoi thu 1 lap dc 1/4tong chi tiet may .Nguoi thu 2 lap dc 0,4 lan tong chi tiet may.so chi tiet may nguoi thu 3 lap dc bng 50% so chi tiec may nguoi tu 2 lap dc .Tinh so chi tiet may nguoi thu 4 lap dc
Giup gium minh nha ,tks cac ban!!!
Nho ghi ra cach giai nha !!!