Search found 18 matches
number property q.
If 3x + 7y = 8x − 18y and y > 7, then which of the following must be true? a. x <7/5 b. x < 5 c. x > 18 d. x < 35 e. x > 36 The correct answer is c. I get to the point where x>35. Now, how is it that x>18 is a must? If x>35, shouldn't x be anything but smaller than 35, which would make &qu...
- by godemol
Sun Aug 09, 2009 10:32 pm- Forum: Data Sufficiency
- Topic: number property q.
- Replies: 3
- Views: 1376
probability Q.
Guys, a simple question, but I am having hard time grasping. Need your help: The events A and B are independent. The probability that event A occurs is p and the probability that event B occurs is q. Which of the following is equal to the probability that exactly one of the events A and B occurs ? A...
- by godemol
Sun Aug 09, 2009 9:29 pm- Forum: Data Sufficiency
- Topic: probability Q.
- Replies: 1
- Views: 951
algebra simultaneous question
The following is question #70 from OG 12th: Mary persuaded n friends to donate $500 each to her election campaign, and then each of these n friends persuaded n more people to donate $500 each to Mary's campaign. If no one donated more than once and if there were no other donations, what was the valu...
- by godemol
Fri Jul 31, 2009 8:42 am- Forum: Data Sufficiency
- Topic: algebra simultaneous question
- Replies: 2
- Views: 1387