A, B and C can do a job working alone in 50, 75 and 20 days respectively. They all work together for 4 days, then C quits. How many days will A and BÂ take to finish the rest of the job?

A, B and C can do a job working alone in 50, 75 and 20 days respective

1.	A, B and C can do a job working alone in 50, 75 and 20 days respectively. They all work together for 4 days, then C quits. How many days will A and BÂ take to finish the rest of the job?
A.	20
B.	30
C.	18
D.	24
Answer» B. 30

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A, B and C can do a job working alone in 50, 75 and 20 days respectively. They all work together for 4 days, then C quits. How many days will A and BÂ take to finish the rest of the job?

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