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Re: x and y are two numbers [#permalink]
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Carcass wrote:
If you think in a more abstract way:

A)\(x*y\)

B) \(\frac{4}{5}x * \frac{5}{4}y = x*y\)

So the answer is C.

However, the question is flawed: if you pick numbers the two quantities are NOT equal. So the answer is D.

Regards



but spoiler still says C..it shoudl be D right.
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Re: x and y are two numbers [#permalink]
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Done and thank you so much.

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Re: x and y are two numbers [#permalink]
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Is the answer D as x,y can take any value even zero?
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Re: x and y are two numbers [#permalink]
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Yes, confirmed.

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Re: x and y are two numbers [#permalink]
No matter what x and y are, xy = xy is always true. Why would C be not correct?
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Re: x and y are two numbers [#permalink]
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Re: x and y are two numbers [#permalink]
Carcass wrote:


Sorry still don't get you. What numbers you talking about? Numbers for x and y?
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Re: x and y are two numbers [#permalink]
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Guys, I think we have overlooked the question.

The OA is correct and it is C.

If we pick numbers and these are : -1/2, -1, 0, 1, 1/2

The result of any combination of these is always C. Whenever the stem does not mention anything about what numbers we have to deal with, the consequence is that not always the time the answer is D.

Thank you for the discussion
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Re: x and y are two numbers [#permalink]
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Carcass wrote:
Guys, I think we have overlooked the question.

The OA is correct and it is C.

If we pick numbers and these are : -1/2, -1, 0, 1, 1/2

The result of any combination of these is always C. Whenever the stem does not mention anything about what numbers we have to deal with, the consequence is that not always the time the answer is D.

Thank you for the discussion


Thank you for clarifying. Been scratching my head what's wrong, what's wrong..
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Re: x and y are two numbers [#permalink]
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A) x*y

B) (80% of x ) * (125% of y) => [(80/100)*x] * [(125/100)*y]. Simplifying this expression gives x*y which is same as A.

Hence both quantities are same. Answer choice C
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Re: x and y are two numbers [#permalink]
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Guys it doesn't matter what the values of X and Y are!

Col. A: XY
Col. B: 0.8X x 1.25Y = XY

Whatever, the values, they will always be equal.
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Re: x and y are two numbers [#permalink]
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Qnt A = x * y
Qnt B = 0.8 x * 1.25 y = x * y

Answer is C
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