Ba ban Ha , Nam va Linh di mua but. Biet Ha mua 19 cai but . Nam mua 17 cai but . Linh mua so cai but la so nho nhat co hai chu so giong nhau .
A) Ha va Nam mua bao nhieu cai but ?
B) Ha va Linh mua bao nhieu cai but ?
C) Nam va Linh mua bao nhieu cai but ?
D) Linh mua bao nhieu cai but ?
E) Tong so but cua ba ban mua la bao nhieu ?