The 54 books are divided into three groups. Group A's 12 is equal to group B's 13 and group C's 14______ 、______ 、______ Ben

The 54 books are divided into three groups. Group A's 12 is equal to group B's 13 and group C's 14______ 、______ 、______ Ben

Because 12a = 13b, we can know that a: B = 2:3, 13b = 14C, we can know that B: C = 3:4, so a: B: C = 2:3:4. Books of group a 54 × 22 + 3 + 4 = 54 × 29 = 12 (copies) books of group B: 54 × 32 + 3 + 4 = 54 × 39 = 18 (copies) books of group C: 54 × 42 + 3 + 4 = 54 × 49 = 24 (copies) answer: 12 books of group A, 18 books of group B, 24 books of group C