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Option 1 : 9 : 20
Calculation:
The total number of workers whose daily wages are less than Rs. 500 = (20 + 25) = 45
The total number of workers whose daily wages are Rs. 600 and above = (40 + 60) = 100
The ratio of the total number of workers whose daily wages are less than Rs. 500 to the total number of workers whose daily wages are Rs. 600 and above
⇒ (45 : 100)
⇒ 9 : 20
∴ The required ratio is 9 : 20
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