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If m, r, x and y are Positive, the Ratio of m to r Equal to the Ratio GMAT Data Sufficiency

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Sayantani Barman

Experta en el extranjero | Updated On - Dec 30, 2022

Question: If m, r, x, and y are positive, the ratio of m to r equal to the ratio x and y?

  1. The ratio of m to y is equal to the ratio of x to r
  2. The ratio of m + x to r + y is equal to the ratio of x to y
  1. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
  2. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
  3. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
  4. EACH statement ALONE is sufficient.
  5. Statements (1) and (2) TOGETHER are NOT sufficient.

Correct Answer: B

Approach Solution (1):

(1) The ratio of m to y is equal to the ratio of x to r\(\rightarrow\frac{m}{y}=\frac{x}{r}\rightarrow{mr}={xy}\)
Not sufficient

(2) The ratio of m + x to r + y \(\rightarrow\frac{m+x}{r+y}=\frac{x}{y}\rightarrow\) is equal to the ratio of x to ycross multiply my + xy = rx + xymy = rx
Sufficient

Correct option: B

Approach Solution (2):

I think you are assuming that \(\frac{r}{y}\)can be never equal \(\frac{y}{r}\)

If y = 1, r = 1, then \(\frac{r}{y}=\frac{y}{r}\)

Such values can show that statement 1 is sufficient to answer the equation. However, for some other values, statement 1 will not be sufficient to answer the question. That is why it is Insufficient.

Statement 2, on the other hand, will always be sufficient because after cross multiplication, the xy will cancel out from both sides of the equation, giving us only the equation my = xr. This is sufficient to answer the question regardless of the values that each of the variables takes. That is why it is sufficient.

Correct option: B

“m, r, x, and y are positive, the ratio of m to r equal to the ratio x and y?”- is a topic of the GMAT Quantitative reasoning section of GMAT. This question has been taken from the book "GMAT Quantitative Review". GMAT Quant section consists of a total of 31 questions. GMAT Data Sufficiency questions consist of a problem statement followed by two factual statements.

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*The article might have information for the previous academic years, please refer the official website of the exam.

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