Answer:
4. B
Step-by-step explanation:
x/y =1/2
ie 2x=y
Also (x+2) ÷ (y+1) = 2/3
substituting for y we get,
x=4
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GMAT Club Forum Index Problem Solving (PS)
A merchant sells a certain item for a price that is a whole number of : Problem Solving (PS)
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Bunuel
EXPERT'S
POST
Feb 4, 2018

00:00
A
B
C
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E
DIFFICULTY:
   15% (low)
QUESTION STATS:
based on 54 sessions
81% (01:19) correct
19% (01:52) wrong
A merchant sells a certain item for a price that is a whole number of dollars. If the cost of the item to her is $50, then which of the following could be her profit as a percentage of her cost?
(A) 15%
(B) 25%
(C) 33 1/3%
(D) 40%
(E) 75%
Spoiler: OA
Kudos
0 kudos, 1 bookmark
pushpitkc
Feb 5, 2018
Analyzing the answer options to calculate the total profit
(A) 15% of 50 is 7.5
(B) 25% of 50 is 12.5
(C) 33 1/3% of 50 is 16.67
(D) 40% of 50 is 20
(E) 75% of 50 is 37.5
Since selling price is the sum of the cost price and the profit, only 40%
gives us a whole number for selling price, making it our answer choice.(Option D)
Kudos
Mo2men
Feb 5, 2018
Bunuel wrote:A merchant sells a certain item for a price that is a whole number of dollars. If the cost of the item to her is $50, then which of the following could be her profit as a percentage of her cost?
(A) 15%
(B) 25%
(C) 33 1/3%
(D) 40%
(E) 75%
Profit = Price - Cost
Now lets make the denominator = 100...So multiply both numerator and denominator by 2
Now you can equal each answer choice easily with equation above.......You need answer that creates even number to be divided by 2
Choices A, B, & E makes the number ending with 5 odd............Eliminate
Choice C is very clear ..........................................................Eliminate
Only one answer left.
Answer D
Check it
2Price - 100 = 40.........2Price = 140......P= 70...Bingo
