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Manager  Joined: 23 Jan 2008
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The total cost of a vacation was divided equally among 3 people. If  [#permalink]

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Difficulty:   15% (low)

Question Stats: 82% (01:15) correct 18% (01:29) wrong based on 134 sessions

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The total cost of a vacation was divided equally among 3 people. If the total cost of the vacation had been divided equally among 4 people, the cost per person would have been $50 less. What was the total cost of the vacation? A.$200
B. $300 C.$400
D. $500 E.$600

Originally posted by blog on 31 Jan 2008, 20:00.
Last edited by Bunuel on 08 Oct 2019, 07:16, edited 2 times in total.
Renamed the topic, edited the question, added the OA and moved to PS forum.
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blog wrote:
The total cost of a vacation was divided among 3 people. If the total cost of the vacation had been divided equally among 4 people, the cost per person would have been $50 less. What was the total cost cost of the vacation? 1.$200
2. $300 3.$400
4. $500 5.$600

x/3=c x/4=c-50 ---> x/4=x/3-50 ---> x/4-x/3=-50 --> -x/12=-50 --> x=600

E
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Re: The total cost of a vacation was divided equally among 3 people. If  [#permalink]

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x/4=x/3-50 where x is total cost of vacation

x=600
Intern  Joined: 28 Oct 2015
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Re: The total cost of a vacation was divided equally among 3 people. If  [#permalink]

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C for cost.
P price per person.
C= 3*P
C-200=4*P

Substituting the value of P from the first equation onto the second we get P = 200.
Plugging in the value of P in the first equation, we get C= 600. Which leads us to answer choice E
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GMAT 1: 800 Q51 V49 GRE 1: Q170 V170 Re: The total cost of a vacation was divided equally among 3 people. If  [#permalink]

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Hi All,

This question can be solved by TESTing THE ANSWERS. There are also some logical 'shortcuts' in the design of this question that you can take advantage of.

We're told that the total cost of a vacation was divided among 3 PEOPLE. We're then told that if the total cost of the vacation had been divided equally among 4 PEOPLE, then the cost per person would have been $50 LESS. We're asked for the total cost of the vacation. Looking at the answer choices, we can see that they're all 'nice' round numbers. Since the total cost was originally going to be divided among 3 people, that cost is almost certainly going to be a multiple of 3. Only answers B and E fit that pattern. Let's TEST Answer B:$300

IF.... Total Cost = $300 Cost for 3 people =$100 each
Cost for 4 people = $75 each Difference =$25
This is NOT a match for what we were told (the difference is supposed to be $50). Eliminate Answer B. Notice how$25 is exactly HALF of $50 though.... Maybe we need to DOUBLE all of the values.... Let's TEST Answer E:$600

IF.... Total Cost = $600 Cost for 3 people =$200 each
Cost for 4 people = $150 each Difference =$50
This is an exact MATCH for what we were told, so this MUST be the answer.

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blog wrote:
The total cost of a vacation was divided among 3 people. If the total cost of the vacation had been divided equally among 4 people, the cost per person would have been $50 less. What was the total cost cost of the vacation? A.$200
B. $300 C.$400
D. $500 E.$600

Let T = total cost of vacation
So, T/3 = cost per person with THREE people
And T/4 = cost per person with FOUR people

If the total cost of the vacation had been divided equally among 4 people, the cost per person would have been $50 less. In other words (cost per person with FOUR people) = (cost per person with THREE people) -$50
We can write: T/4 = T/3 - 50

At this point, we can EITHER test the answer choices OR solve the equation.
Let's solve the equation.

Take: T/4 = T/3 - 50
12 is the LCM of 3 and 4, so multiply both sides by 12 to get: 3T = 4T - 600
Solve: T = 600

Cheers,
Brent
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Re: The total cost of a vacation was divided equally among 3 people. If  [#permalink]

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blog wrote:
The total cost of a vacation was divided among 3 people. If the total cost of the vacation had been divided equally among 4 people, the cost per person would have been $50 less. What was the total cost cost of the vacation? A.$200
B. $300 C.$400
D. $500 E.$600

$$? = 12T\,\,\,\,\left[ \ \right]$$

$${\text{per}}\,\,{\text{person}}\,\,\,:\,\,\,\frac{{12T}}{3} = \frac{{12T}}{4} + 50\,\,\,\,\, \Rightarrow \,\,\,T = 50\,\,\,\,\,\,\, \Rightarrow \,\,\,\,\,\,? = 600\,\,\,\,\left[ \ \right]$$

We follow the notations and rationale taught in the GMATH method.

Regards,
Fabio.
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Re: The total cost of a vacation was divided equally among 3 people. If  [#permalink]

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blog wrote:
The total cost of a vacation was divided among 3 people. If the total cost of the vacation had been divided equally among 4 people, the cost per person would have been $50 less. What was the total cost cost of the vacation? A.$200
B. $300 C.$400
D. $500 E.$600

$$\frac{x}{3} - \frac{x}{4} = 50$$

So, We know that x must be completely divisible by both 3 & 4

Least possible value of x is LCM of 3 & 4 = 12

Now, Check the options, Only (E) 600 is divisible by 12, thus Answer must be (E)
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Re: The total cost of a vacation was divided equally among 3 people. If  [#permalink]

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blog wrote:
The total cost of a vacation was divided among 3 people. If the total cost of the vacation had been divided equally among 4 people, the cost per person would have been $50 less. What was the total cost cost of the vacation? A.$200
B. $300 C.$400
D. $500 E.$600

We let x = the total cost of the vacation and create the equation:

x/4 = x/3 - 50

Multiplying both sides of the equation by 12, we have:

3x = 4x - 600

600 = x

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If you find one of my posts helpful, please take a moment to click on the "Kudos" button. Re: The total cost of a vacation was divided equally among 3 people. If   [#permalink] 01 Feb 2019, 18:34
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