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26 Mar 2018, 23:05
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
95% (00:48) correct
5%
(01:15)
wrong
based on 56
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If A = 7x/5y, with y ≠ 0, what is the value of A?
(1) x = 10y
(2) x = 5/7
(1) x = 10y
(2) x = 5/7
27 Mar 2018, 00:52
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Bunuel
This is a simple Q.
\(A = \frac{7x}{5y}\) and we need to find A.
(1) x = 10y. If we substitute the value of x, the y cancels out (note y ≠ 0 is given!
and we can find A. Sufficient.(2) x = 5/7 when substituted leaves y which is a variable in the result. Hence A is not determined. Insufficient.
Hence Option (A) is correct
02 Apr 2018, 13:56
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I personally analyzed first that we have two variables in the question. To determine the value we need to eliminate both variables. Hence, we need a statement or a combination of statements that eliminates these two variables.
Statement (1) does exactly that by substituting x with 10y. This allows us to cancel out y because we have y in the numerator and denominator of the fracttion.
Statement (2) leaves us with y in the denominator and hence doesn't solve the question.
In conclusion, answer A is correct
Statement (1) does exactly that by substituting x with 10y. This allows us to cancel out y because we have y in the numerator and denominator of the fracttion.
Statement (2) leaves us with y in the denominator and hence doesn't solve the question.
In conclusion, answer A is correct
