campus placement HP Test Series Quantitative Aptitude Time and Work Work Efficiency

Tom works for 7 hours in a day, while Jerry works for 9 hours. To do a particular work alone, Tom needs 76 days and Jerry needs 52 days. What is the ratio of their work efficiencies?

1

117 : 133

2

112 : 119

3

199 : 161

4

None of these

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