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30 Nov 2019, 11:08
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
74% (01:27) correct
26%
(01:20)
wrong
based on 92
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Given that \(X\) and \(Y\) are non–negative, what is the value of X?
(1) \(2X + 2Y ≤ 40 \)
(2) \(X – 2Y ≤ 20\)
(1) \(2X + 2Y ≤ 40 \)
(2) \(X – 2Y ≤ 20\)
30 Nov 2019, 11:34
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That should be (E).
X and y are nonnegative means they can be 0 or positive.
Statement (1):
2x+2y is less than or equal to 40
= x+y is less than or equal to 20.
So many possibilities for x. INSUFFICIENT.
For example:
x is 10, y is 1
x is 11, y is 1
Statement (2):
x-2y is less than or equal to 20
again, too many possibilities for x. INSUFFICIENT.
For example:
X=10, y=1
X=11, y=1
Together, still INSUFFICIENT!
Look I have used the same numbers.
Picking smart numbers will always help you at the end. Here even if we add those two inequalities, we will get something like
"x is less than 20" that means x can have all the values 0,1,....20!
But we don't need to do this far!
Saving 3/4 seconds or even 10 seconds is huge important.
If it's helpful, Leave a KUDOS!
Happy Thanksgiving BelalHossain046
Posted from my mobile device
X and y are nonnegative means they can be 0 or positive.
Statement (1):
2x+2y is less than or equal to 40
= x+y is less than or equal to 20.
So many possibilities for x. INSUFFICIENT.
For example:
x is 10, y is 1
x is 11, y is 1
Statement (2):
x-2y is less than or equal to 20
again, too many possibilities for x. INSUFFICIENT.
For example:
X=10, y=1
X=11, y=1
Together, still INSUFFICIENT!
Look I have used the same numbers.
Picking smart numbers will always help you at the end. Here even if we add those two inequalities, we will get something like
"x is less than 20" that means x can have all the values 0,1,....20!
But we don't need to do this far!
Saving 3/4 seconds or even 10 seconds is huge important.
If it's helpful, Leave a KUDOS!
Happy Thanksgiving BelalHossain046
Posted from my mobile device
30 Nov 2019, 13:18
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RashedVai
Happy Thanksgiving RashedVai.
Some crazy things in this question are-
1. Nonnegative (that means ZERO can be a value of x or y)
2. EQUAL or LESS [If you comply one of them (i.e. if you comply LESS without complying EQUAL), the statement is still valid. No need to comply both LESS and EQUAL.
normally it is easier to comply LESS than to comply EQUAL rules.]
