One person can do a certain job in six days, a second person can do the same job in two days, and a third person can do this job in three days. How many days will they take to do the job together?
1 day
2 days
6 days
So here is how we answer this: Given that: Person A can finish job in 6 days Person B can finish job in 2 days Person C can finish job in 3 days. So let us present it this way. x/6 + x/2 + x/3 = number of days Find common denominator which is 6. x/6 +3x/6 + 2x/6 = days 6x/6 = days x = 1 day. Therefore, they can finish a certain job together in 1 day. The correct answer would be the first option. Hope this helps.
