If \(ax + ay + az = 15,\) what is \(x + y + z ?\)
(1) \(x = 2\)
(2) \(a = 5\)
[spoiler]OA=B[/spoiler]
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If \(ax + ay + az = 15,\) what is \(x + y + z ?\)
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beatGMAT1221
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Given, ax + ay + az = 15
=> a (x+y+z) =15
Find, (x+y+z)
We can see that if we know the value of 'a', we can find the value of (x+y+z).
(1) value of x is insufficient.
(2) Yes, value of a is sufficient to find the value of (x+y+z). So, B is the answer.
If you have any doubt, please let me know.
Please give an upvote. Thanks!
=> a (x+y+z) =15
Find, (x+y+z)
We can see that if we know the value of 'a', we can find the value of (x+y+z).
(1) value of x is insufficient.
(2) Yes, value of a is sufficient to find the value of (x+y+z). So, B is the answer.
If you have any doubt, please let me know.
Please give an upvote. Thanks!
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Jay@ManhattanReview
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Your Answer
A
B
C
D
E
Global Stats
Let's take each statement one by one.
(1) \(x = 2\)
We don't have value of y and z. Insufficient.
(2) \(a = 5\)
From \(ax + ay + az = 15,\) we have \(a(x + y + z) = 15.\) Thus, \(x + y + z = 15/5 = 3\). Sufficient.
Correct answer: B
Hope this helps!
-Jay
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