An employer reduces the number of his employees in the ratio of 7 4 and increases their wages in the...........

Quantitative Aptitude ( CCS) Ratio, Proportion

An employer reduces the number of his employees in the ratio of 7:4 and increases their wages in the ratio 3:5. State whether his bill of total wages increases or decreases and in what ratio.

increases 20:21

decreases 21:20

increases 21:22

decreases 22:21

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Explanation:

Let initial employees be 7x and then 4x similarly initial wages be 3y and then 5y
so total wage = 21xy initially and then 20xy
so wages decreases and ratio = 21:20