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tagged by: M7MBA

## If the total income of a family per month is $6000 and. . . If the total income of a family per month is$6000 and the median income is $2000, how many members are there in the family? A. 2 B. 3 C. 4 D. 5 E. 6 The OA is B. Experts, How can I determine which one is the correct answer? Thanks! ### GMAT/MBA Expert Legendary Member Joined 14 Jan 2015 Posted: 2667 messages Followed by: 122 members Upvotes: 1153 GMAT Score: 770 M7MBA wrote: If the total income of a family per month is$6000 and the median income is $2000, how many members are there in the family? A. 2 B. 3 C. 4 D. 5 E. 6 The OA is B. Experts, How can I determine which one is the correct answer? Thanks! You'd typically want to test the easiest possible scenario that satisfies the conditions of the problem. Here, the incomes could be 2000, 2000, 2000. And you've got 3 members. So you're done. The answer is B However, this question should have been worded more precisely. If, for example, the incomes had been 0, 2000, 2000, 2000, the median would still have been 2000, the total would still have been 6000, and you'd have had 4 members. So there should have been some stipulation that everyone in the family generates a positive income. _________________ Veritas Prep | GMAT Instructor Veritas Prep Reviews Save$100 off any live Veritas Prep GMAT Course

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### GMAT/MBA Expert

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Hi M7MBA,

We're told that the TOTAL income for a group of people is $6,000 and the MEDIAN of the group is$2,000. We're asked for the total number of people in the group. While the prompt does not explicitly state it, based on the correct answer, we're meant to assume that EACH family member generates some income. Since the answer choices are numbers, we can use them 'against' the prompt and TEST THE ANSWERS.

IF... there were 2 people, and the median = $2,000... then the total would be (2)($2,000) = $4,000. That does NOT match what we were told though (the total is supposed to be$6,000), so Answer A is NOT correct.

The median = $2,000, so we would need one LARGER value and one SMALLER value. Those values could be$3,000 and $1,000, respectively... and that would create a total of$6,000, so this MUST be the answer.

GMAT assassins aren't born, they're made,
Rich

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