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A can do a piece of work in 15 days and B can do it in 16 days and C can do it 24 days. They started the work together and A leaves after 3 days and B leaves after 4 days from the beginning. How long will work lost ?

Correct Answer: 13 1/5 days

Explanation:

3/15 + 4/16 + x/24 = 1


x = 13 1 5


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