There are three departments in an organ. There are 84 civil servants in department a, 56 civil servants in department B and 60 civil servants in department C. if each department cuts down its staff according to the same proportion and leaves 150 civil servants in this organ, how many civil servants are left in departments a, B and C?

The reduction ratio of the three departments is: 150: (84 + 56 + 60) = 150:200 = 3:4, so the number of staff left by a is: 84 × 34 = 63 (people), the number of staff left by B is: 56 × 34 = 42 (people), the number of staff left by C is: 60 × 34 = 45 (people). A: the number of civil servants left by a, B and C departments is 63, 42 and 45 respectively

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