A, B and C can complete a piece of work in 24, 6 and 12 days respectively. Working together, they will complete the same work in:

1 day 24
7 day 24
3 3 days 7
4 days

Correct Answer: 3 3 days 7

Explanation:

Formula: If A can do a piece of work in n days, then A's 1 day's work =	1	.
	n

(A + B + C)'s 1 day's work =	❨	1	+	1	+	1	❩	=	7	.
		24		6		12			24

Formula: If A's 1 day's work =	1	,	then A can finish the work in n days.
	n

So, all the three together will complete the job in	❨	24	❩ days	=	3	3	days.
		7				7

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