In a car exhibition, seven cars of seven different companies viz. Cardilac, Ambassador, Fiat, Maruti, Mercedes, Bedford and Fargo were displayed in a row, facing east such that :
Cardilac car was to the immediate right of Fargo.
Fargo was fourth to the right of Fiat.
Maruti car was between Ambassador and Bedford.
Fiar, which was third to the left of Ambassador car, was at one of the ends.
Which of the following was the correct position of the Mercedes ?
A man, a woman or a boy can do a piece of work in 3, 4 and 12 days respectively. How many boys must assist one man and one woman to do the work in one days ?