3 years ago in Time and Work

A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is:

[A] 8/15
[B] 7/15
[C] 2/3
[D] 31/60
[E] None of these
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Sayed badruzama
Sayed badruzama - 3 years ago

Sayed badruzama from Mumbai, India is saying 8/15 is correct answer

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