Simple Question

[NYC_Kid]

Data Sufficiency problem:

If ax + ay=15, what is x+y+z?

(1) x=5

(2) a=5

Answer:

Statement (1) gives us a value for x, but we need x+y+d. Statemnt (1) is not sufficient. We're down to Statement 2, 3 and 4. Statement (2) might not have seemed much more helpful, but using the distributive property, we can rewrite the orginal equation to read a(x+y+z)=15. If a is 5, then x+y+z must equal 3. The correct answer is Statement 2.

--------

-The bolded in red is a typo right. Where did they get d?

-I don't see what they did in the 2nd bolded part in purple? The equation is ax+ay=15, which would factor to a(x+y)=15 and if A is 5, then x+y would equal to 3, but we still wouldn't know what Z would be.

Thus I picked choice E, "statements (1) and (2) together are not sufficient.

Edit:

There's a typo, it's X=2, not x=5.

[abhishek_mumbai]

I do not understand what is the question? Can you please post correct question again?
I don't see z in original equation.. Is ths typo or part of the question?

[NYC_Kid]

It was a typo on their part. Here's the official question and answer:

Question:
http://i43.tinypic.com/35c225z.jpg

Answer:
http://i40.tinypic.com/124yeft.jpg

[spacepure]

Well, I believe that there is typo in the original question.
The question should be "If ax + ay+az =15, what is x+y+z?" (+az is omitted)

[hrif]

I think we just have to answer E ( both statments together are not suff)

[hrif]

Okay, according to the answer, there is a typo in the question, the az term is omitted.