Search found 47 matches
yes it should be correct....
the other way would be...
1. station A 0.3
2. station B 0.7x0.3 = 0.21
3. station C 0.7x0.7x0.3 = 0.147
1+2+3 = .657
but i think 1-p is a better way
- by sochatte
Sun Dec 16, 2007 4:18 pm- Forum: Problem Solving
- Topic: GMATprep probability
- Replies: 2
- Views: 3041
GMATprep probability
On his drive to work, Leo listens to one of three radio stations A, B, or C. He first turns to A, if A is playing a song he likes, he listens to it; if not, he turns to B. If B is playing a song he likes, he listens to it; if not, he turns to C. If C is playing a song he likes, he listens to it; if ...
- by sochatte
Sun Dec 16, 2007 12:46 pm- Forum: Problem Solving
- Topic: GMATprep probability
- Replies: 2
- Views: 3041
GMATprep DS
Is the hundredth digit of decimal d greater than 5?
1). The tenth digit of 10d is 7
2). The thousandth digit of d/10 is 7
could someone ecplain.....
- by sochatte
Sun Dec 16, 2007 11:35 am- Forum: Data Sufficiency
- Topic: GMATprep DS
- Replies: 1
- Views: 1532
SET SC
On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow , as seen in the rings visible in the cross sections of their trunks. A. On Earth, among the surest indications of sunspot cycles are believed to be the rate that trees grow B. On Earth, among the s...
- by sochatte
Sat Dec 15, 2007 11:05 pm- Forum: Sentence Correction
- Topic: SET SC
- Replies: 11
- Views: 3261
Need help with the explanations
Is x negative?
1. x^3(1-x^2) < 0
2. x^2 - 1 < 0
I need help with explanations...
- by sochatte
Wed Dec 12, 2007 7:11 pm- Forum: Data Sufficiency
- Topic: Need help with the explanations
- Replies: 1
- Views: 1488
- by sochatte
Wed Dec 12, 2007 1:04 am- Forum: Sentence Correction
- Topic: MGMAT SC...Danielle plz help...
- Replies: 8
- Views: 2364
MGMAT SC...Danielle plz help...
The Daughters of the American Revolution, a volunteer service organization, admits as members only women who can prove lineal descent from a patriot of the American Revolution. a.admits as members only women who can prove lineal descent b.admit as members only women who can prove lineal descent c.ad...
- by sochatte
Wed Dec 12, 2007 12:05 am- Forum: Sentence Correction
- Topic: MGMAT SC...Danielle plz help...
- Replies: 8
- Views: 2364
- by sochatte
Mon Dec 10, 2007 12:04 am- Forum: Sentence Correction
- Topic: GMATprep SC
- Replies: 1
- Views: 1667
SC ...need help
When drive-ins were at the height of their popularity in the late 1950’s, some 4,000 existed in the United States, but today there are less than one-quarter that many. A. there are less than one-quarter that many B. there are fewer than one-quarter as many C. there are fewer than one-quarter of that...
- by sochatte
Sat Dec 08, 2007 10:41 am- Forum: Sentence Correction
- Topic: SC ...need help
- Replies: 4
- Views: 2000
Need help with the SC
The first trenches that were cut into a 500-acre site at Tell Hamoukar, Syria, have yielded strong evidence for centrally administered complex societies in northern regions of the Middle East that were arising simultaneously with but independently of the more celebrated city-states of southern Mesop...
- by sochatte
Wed Dec 05, 2007 10:02 pm- Forum: Sentence Correction
- Topic: Need help with the SC
- Replies: 4
- Views: 2070
Need help with the explanations
The state has proposed new rules that would set minimum staffing levels for nurses, rules intended to ensure that at least one nurse is assigned for every four patients put through triage in a hospital emergency room . A. rules intended to ensure that at least one nurse is assigned for every four pa...
- by sochatte
Wed Dec 05, 2007 9:54 pm- Forum: Sentence Correction
- Topic: Need help with the explanations
- Replies: 2
- Views: 1855
MH CR question...
According to a study of more than 50,000 Norwegian smokers, smokers who reduced their nicotine intake from cigarettes, even by up to 50 percent, did not achieve significant health benefits. The mortality rate for those who cut back on cigarettes was not lower than that for heavier smokers; moreover,...
- by sochatte
Sat Dec 01, 2007 4:20 pm- Forum: Critical Reasoning
- Topic: MH CR question...
- Replies: 2
- Views: 1719
Need help with the SC
Q10: Antarctica receives more solar radiation than does any other place on Earth, yet the temperatures are so cold and the ice cap is reflective, so that little polar ice melts during the summer; otherwise, the water levels of the oceans would rise 250 feet and engulf most of the world’s great citie...
- by sochatte
Fri Nov 30, 2007 12:38 am- Forum: Sentence Correction
- Topic: Need help with the SC
- Replies: 5
- Views: 2201
- by sochatte
Thu Nov 29, 2007 10:25 am- Forum: Data Sufficiency
- Topic: any easy of solving this kind of problem
- Replies: 3
- Views: 1548
hey guys thx for replying. However, the ans is A. But now I think I understand what is going on here. 1. basically stmt 1 says the tens digit of k + 9 is 3 so when we do abc + 9, b becomes 3. Since we know c is between 1 and 9, we can find b is 2. 2. The tens digit of k + 4 is 2. this means we do ab...
- by sochatte
Thu Nov 29, 2007 12:43 am- Forum: Data Sufficiency
- Topic: Need help with the explanations
- Replies: 5
- Views: 1651