3 men or 6 women can do a piece of wo...

3 men or 6 women can do a piece of work in 20 days. In how many days will 12 men and 8 women do the same work? `3 1/2d a y s` b. `3 3/4d a y s` c. `4\ d a y s` d. `5\ d a y s`

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