Search found 6 matches
Straight forward:
(x-5)(x+10)(2x-5)=0 <==> one of the following 3 equations must be true
1) x-5 = 0 so x = 5, or
2) x+10 = 0 so x = -10, or
3) 2x-5 = 0 so x = 5/2
END//
- by Jmx
Tue Jan 12, 2010 11:04 am- Forum: Problem Solving
- Topic: solutions to (x-5)(x+10)(2x-5)=0 ?????
- Replies: 1
- Views: 1874
I think Brent's pictures explain it greatly, but they can be confusing as they are not drawn to scale (same in the problem)... The bisector in an equilateral triangle should intersect the Base at its middle.
- by Jmx
Sat Jan 09, 2010 6:10 pm- Forum: Problem Solving
- Topic: circle question
- Replies: 11
- Views: 2098
- by Jmx
Fri Jan 08, 2010 4:49 pm- Forum: Problem Solving
- Topic: Deck of Cards - A beautiful Pair
- Replies: 3
- Views: 1799
If you got only one wrong out of the last 6 (31-36) with only one question left blank, then 46 is not that surprising. How many did you get wrong in total?
Bottom line: the software does not know which ones you guess, what matters is wether it is right or wrong.
Good luck 
- by Jmx
Fri Jan 08, 2010 1:48 pm- Forum: GMAT Math
- Topic: Q46 on GMATPrep 1?
- Replies: 6
- Views: 2001
Deck of Cards - A beautiful Pair
QUESTION: Bill has a small deck of 12 playing cards made up of only 2 suits of 6 cards each. Each of the 6 cards within a suit has a different value from 1 to 6; thus, there are 2 cards in the deck that have the same value. Bill likes to play a game in which he shuffles the deck, turns over 4 cards,...
- by Jmx
Fri Jan 08, 2010 12:07 pm- Forum: Problem Solving
- Topic: Deck of Cards - A beautiful Pair
- Replies: 3
- Views: 1799
Hi there. Here is how I get to 8/9. It is tempting to go the (1-x) route here but it would be too studious in this case. Let's go straigth to P (Probability that all 3 secretaries are assigned at least one report). P = Total Desired Outcomes / Total Possible Outcomes Total Possible Outcomes = 3^4 (w...
- by Jmx
Fri Jan 08, 2010 9:06 am- Forum: Problem Solving
- Topic: Tough probability
- Replies: 28
- Views: 9596