Ta có sơ đồ khi bi xanh cộng bi đỏ và gấp 5 lần bi vàng:
Vì khi bi xanh cộng bi đỏ là 2 loại bi rồi mà thêm bi vàng nữa là 3 loại ta giữ nguyên tổng.
Bi xanh + Đỏ: l-----------------l-----------------l-----------------l-----------------l-----------------l
Bi vàng: l-----------------l Tổng là \(48\)viên bi.
Giải:
Số viên bi loại vàng có là:
48 : (5 + 1) x 1 = 8 (viên bi loại vàng)
Tổng số viên bi nếu loại bi vàng ra là:
48 - 8 = 40 (viên bi)
Ta có sơ đồ như sau:
Bi xanh: l----------------------------l- - - - - - - l
Bi đỏ: l----------------------------l 8 viên bi vàng Tổng 40 viên bi
Giải:
Số viên bi loại xanh có là:
(40 + 8) : 2 = 24 (viên bi)
Số viên bi loại đỏ có là:
40 - 24 = 16 (viên bi)
Đáp số:Bi đỏ:16 viên.
Bi xanh:24 viên.
Bi vàng:8 viên.
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