Plz explain
A female worker can do a job in 12 hours & Male member can do the same job in 6 hours. if equal numbers of male & female member were deployed to do that job & the team completed the job in 2 hours. how many male worker were employed?
A.1 B.2 C.3 D.4 E.5
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Hi Noman,
This question is a variation on a Work Formula question, and can be solved in a couple of different ways.
Since a female can complete a job in 12 hours, then she can complete 1/12 of the job per hour.
Since a male can complete a job in 6 hours, then he can complete 1/6 of the job per hour.
With one female and one male, 1/12 + 1/6 = 1/12 + 2/12 = 3/12 = 1/4 of the job is completed per hour. This means that it takes 4 hours to do the job under these conditions.
We're told that a job is completed in 2 hours, which is exactly HALF the time it takes for 1 female and 1 male to complete the job. To cut the time in HALF, we need to DOUBLE the number of workers: 2 females and 2 males. The question asks how many MALES were employed.
Final Answer: B
GMAT assassins aren't born, they're made,
Rich
This question is a variation on a Work Formula question, and can be solved in a couple of different ways.
Since a female can complete a job in 12 hours, then she can complete 1/12 of the job per hour.
Since a male can complete a job in 6 hours, then he can complete 1/6 of the job per hour.
With one female and one male, 1/12 + 1/6 = 1/12 + 2/12 = 3/12 = 1/4 of the job is completed per hour. This means that it takes 4 hours to do the job under these conditions.
We're told that a job is completed in 2 hours, which is exactly HALF the time it takes for 1 female and 1 male to complete the job. To cut the time in HALF, we need to DOUBLE the number of workers: 2 females and 2 males. The question asks how many MALES were employed.
Final Answer: B
GMAT assassins aren't born, they're made,
Rich
GMAT/MBA Expert
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ceilidh.erickson
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Please note that this is NOT a real GMAT question, nor is it particularly GMAT-like. It is riddled with grammatical errors, and displays an obnoxious sexism that the GMAT certainly would not.
It is a bad idea to study from sources that are not even written in grammatically correct English.
It is a bad idea to study from sources that are not even written in grammatically correct English.
Ceilidh Erickson
EdM in Mind, Brain, and Education
Harvard Graduate School of Education
EdM in Mind, Brain, and Education
Harvard Graduate School of Education
