Albert can do a work in 1 hour, Bryan can do it in 2 hours, and Carl can do it in 4 hours. Working together from start, how long can they do the work? | MATHalino

Albert can do a work in 1 hour, Bryan can do it in 2 hours, and Carl can do it in 4 hours. Working together from start, how long can they do the work?

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Multiple Choice Questions (MCQ) uploaded before May 2024

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The local weather forecaster says “no rain” and his record is 2/3 accuracy of prediction. But the Federal Meteorological Service predicts rain and their record is 3/4. With no other data available, what is the chance of rain?
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