Search found 6 matches
1) 2x - 2y = 1 From above x - y = 1/2 So x > y....Insufficient...as both can be +ve or -ve 2) x / y > 1 Insufficient as both can be +ve or -ve. Combined, x > y from 1 and from 2, y needs to be +ve for 1 to be true (else we would have y>x), so it follows that both x and y are +ve. Hence C. What's the...
- by thegenius
Wed Jan 06, 2010 6:11 pm- Forum: Data Sufficiency
- Topic: Help with this inequality question, please
- Replies: 8
- Views: 1266
Here you go... P(E) = (Possible outcomes for E) / (Total possible outcomes) Here, We need to select 2 students, one from Junior class and one from Senior class. Also, The selected students should be a sibling pair, so, First student from Junior Class can be selected in 60 ways (60 cos thats the tota...
- by thegenius
Sun Sep 28, 2008 11:25 pm- Forum: Problem Solving
- Topic: gmat prep-probability
- Replies: 4
- Views: 1752
My attempt!! Square side = 4 diagonal = 4sqrt(2) this squares diagonal is sum to two diagonals of circle so 2d = 4sqrt(2) d = 2sqrt(2) and radius = sqrt(2) Good approach to be able to select the ans from amongst the choices, but this is not exactly the radius, and the actual radius would be slightl...
- by thegenius
Sun Sep 28, 2008 1:18 pm- Forum: Problem Solving
- Topic: Circles and Square.....pls help
- Replies: 13
- Views: 2028
Here is no need to test each statement alone Combining (1) and (2) let m be the number of men, f - the number of women we get 9,8m = summ of men's ages 9,1f = summ of women's ages (9,8m+9,1f)/(m+f) = 9,3 soving we get 5m=2f m/f = 2/5 C Why C? You don't seem to have used stmt (1). Since only info fr...
- by thegenius
Sun Sep 28, 2008 12:46 pm- Forum: Data Sufficiency
- Topic: ds6
- Replies: 10
- Views: 2223
- by thegenius
Wed Jul 23, 2008 12:02 pm- Forum: Let's Meet Up
- Topic: Any one from Pune
- Replies: 29
- Views: 10713
- by thegenius
Wed Jul 23, 2008 11:58 am- Forum: Let's Meet Up
- Topic: Mumbai GMAT meet
- Replies: 25
- Views: 11654