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If 20 percent of x is 5y, and y = 7, what is 60 percent

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by Brent@GMATPrepNow » Sat Apr 27, 2019 6:09 am
Gmat_mission wrote:If 20 percent of x is 5y, and y = 7, what is 60 percent of x?

A. 105
B. 115
C. 125
D. 145
E. 175
GIVEN: 20 percent of x = 5y
This means: 40 percent of x = 10y
And: 60 percent of x = 15y

Since y = 7, we can write: 60 percent of x = 15(7)
= 105

Answer: A
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by Scott@TargetTestPrep » Mon May 06, 2019 7:06 pm
Gmat_mission wrote:If 20 percent of x is 5y, and y = 7, what is 60 percent of x?

A. 105
B. 115
C. 125
D. 145
E. 175

[spoiler]OA=A[/spoiler]

Source: Princeton Review
Since 20 percent of x is 5y and y = 7, we have:

0.2x = 5(7)

0.2x = 35

x = 175

So 60% of 175 is 0.6 x 175 = 105.

Answer: A

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