Search found 8 matches
Let me try. (1) c-a = c + b; (2) c = 0; From (1) -a = b That means (a+b+c)/3 = (a-a+c)/3 = c/3 c = 0, average = 0 which is equal to c c = 1, average = 1/3 which is not equal to c INSUFFICIENT From (2) It tells nothing - INSUFFICIENT (1) + (2), This is exactly as in (1) when c = 0 - SUFFICIENT Answer...
- by ksutthi
Sun Jul 06, 2008 7:14 am- Forum: Data Sufficiency
- Topic: Does the average (arithmetic mean) of a, b and c equals c ?
- Replies: 2
- Views: 2713
m and z can be anything. The question is just like that.
The answer is (C). But I was wondering how I can derive that answer.
- by ksutthi
Sun Jul 06, 2008 4:12 am- Forum: Data Sufficiency
- Topic: Is m+z > 0?
- Replies: 22
- Views: 14176
Is m+z > 0?
Got this from practice test 1. Can somebody help?
Is m+z > 0?
(1) m-3z > 0
(2) 4z-m > 0
Thanks a lot.
- by ksutthi
Sun Jul 06, 2008 1:21 am- Forum: Data Sufficiency
- Topic: Is m+z > 0?
- Replies: 22
- Views: 14176
Thanks. I got the same answer (B), which is wrong.
The answer as indicated in the test is actually (D).
Can anyone help?
- by ksutthi
Sun Jul 06, 2008 12:32 am- Forum: Problem Solving
- Topic: Number property question from practice test 1
- Replies: 11
- Views: 6068
Number property question from practice test 1
if x is positive, which of the following could be the correct ordering of 1/x, 2x and x^2?
I. x^2 < 2x < 1/x
II. x^2 < 1/x < 2x
III. 2x < x^2 < 1/x
A. None
B. I only
C. III only
D. I and II only
E. I, II and III
Can somebody help me figuring this out? Thanks.
- by ksutthi
Sat Jul 05, 2008 11:15 pm- Forum: Problem Solving
- Topic: Number property question from practice test 1
- Replies: 11
- Views: 6068
- by ksutthi
Sat Jul 05, 2008 10:44 pm- Forum: Data Sufficiency
- Topic: Problem from mba.com practice test 1
- Replies: 11
- Views: 3764
Problem from mba.com practice test 1
Can anyone help me solve this question? I don't seem to be able to derive the answer.
In the xy-plane, at what two points does the graph of y = (x+a)(x+b) intersect the x-axis?
(1) a+b = -1
(2) The graph intersects the y-axis at (0,-6)
Many thanks.
- by ksutthi
Sat Jul 05, 2008 3:24 am- Forum: Data Sufficiency
- Topic: Problem from mba.com practice test 1
- Replies: 1
- Views: 1308
Problem from mba.com practice test 1
Can anyone help me solve this question? I don't seem to be able to derive the answer.
In the xy-plane, at what two points does the graph of y = (x+a)(x+b) intersect the x-axis?
(1) a+b = -1
(2) The graph intersects the y-axis at (0,-6)
Many thanks.
- by ksutthi
Sat Jul 05, 2008 3:22 am- Forum: Data Sufficiency
- Topic: Problem from mba.com practice test 1
- Replies: 11
- Views: 3764