Search found 31 matches
If I may interject, what Mitch is trying to say is that the question stem allows two possible values for the probability of k=10: either 1/11 (if the set includes 10), or 0 (if the set does not include 10). So if stat. (2) says that the probability k=10 is the same as the probability of k=-10, all ...
- by saurabhkamal1981
Thu Mar 10, 2011 7:11 am- Forum: Data Sufficiency
- Topic: BTG practice Question - 700 level (probability)
- Replies: 6
- Views: 2698
If P(10) can be only one value, the statement is sufficient. If P(10) can be more than one value, the statement is insufficient. Only one set of values satisfies statement 1: {-10, -8, -6...6, 8, 10}. Thus, P(10) can be only one value: P(10) = 1/11. Sufficient. But more than one set of values satis...
- by saurabhkamal1981
Wed Mar 09, 2011 3:52 am- Forum: Data Sufficiency
- Topic: BTG practice Question - 700 level (probability)
- Replies: 6
- Views: 2698
Statement 2: P(k=-10) = P(k=10) The 11 consecutive even integers could be: -10, -8, -6....6, 8, 10. P(k=-10) = P(k=10) = 1/11. The 11 consecutive even integers could be: 12, 14, 16...28, 30, 32. P(k=-10) = P(k=10) = 0 Insufficient. The correct answer is A . Hi Mitch, Thanks for your reply. Can you ...
- by saurabhkamal1981
Tue Mar 08, 2011 5:52 am- Forum: Data Sufficiency
- Topic: BTG practice Question - 700 level (probability)
- Replies: 6
- Views: 2698
BTG practice Question - 700 level (probability)
*source:- "BTG practice Question" Hi All, Please help in the following question. However, i was not able to solve the second option. One number, k , is selected at random from a set of 11 consecutive even integers. What is the probability that k = 10? (1) The average (arithmetic mean) of t...
- by saurabhkamal1981
Tue Mar 08, 2011 3:39 am- Forum: Data Sufficiency
- Topic: BTG practice Question - 700 level (probability)
- Replies: 6
- Views: 2698
- by saurabhkamal1981
Wed Mar 02, 2011 10:00 am- Forum: Problem Solving
- Topic: 700 level question
- Replies: 3
- Views: 1877
700 level question
Source "BTG practice question" - 700 level question Hi All, Please help. I did a question from "MGMAT- Number properties" - What is the sum of all the integers from 20 to 100, Inclusive ? (1) Found the average - 100 + 20 /2 = 120/2 = 60 (2) Count the number of terms - 100 - 20 + ...
- by saurabhkamal1981
Tue Mar 01, 2011 10:38 am- Forum: Problem Solving
- Topic: 700 level question
- Replies: 3
- Views: 1877
As I have mentioned in the "Given" analysis, the probability that both socks are black = (The probability that the first sock is black)*(The probability that the second sock is black) = (B/8)*((B - 1)/7) This is because... Probability that the first sock is black = (B/8) Probability that ...
- by saurabhkamal1981
Thu Dec 23, 2010 11:34 am- Forum: Data Sufficiency
- Topic: Experts, instructors or anyone please help in 700+ question
- Replies: 4
- Views: 1357
Statement 1: The probability is less than 0.2 that the first sock is black. Thus, (B/8) < 0.2 => B < 1.6 As B must be a non-negative integer, possible values of B are 0 and 1. 1. If B = 0: Required probability = 0 1. If B = 1: Required probability = 0 Sufficient. Statement 2: The probability is mor...
- by saurabhkamal1981
Wed Dec 22, 2010 10:47 am- Forum: Data Sufficiency
- Topic: Experts, instructors or anyone please help in 700+ question
- Replies: 4
- Views: 1357
Experts, instructors or anyone please help in 700+ question
Hi Everyone, I encountered a probability question from BTG practice questions. I need your advise in solving this question as i am not able to understand the explanation. A drawer contains 8 socks, and 2 socks are selected at random without replacement. What is the probability that both socks are bl...
- by saurabhkamal1981
Wed Dec 22, 2010 9:12 am- Forum: Data Sufficiency
- Topic: Experts, instructors or anyone please help in 700+ question
- Replies: 4
- Views: 1357
Problem in P&C question
Hi All, Please help in the following P & C question:- A university cafeteria offers 4 flavors of pizza - pepperoni, chicken, hawaiian and vegetarian. If a customer has an option (but not the obligation) to add extra cheese, mushrooms or both to any kind of pizza, how many different pizza varieti...
- by saurabhkamal1981
Tue Dec 07, 2010 8:29 pm- Forum: Problem Solving
- Topic: Problem in P&C question
- Replies: 1
- Views: 3501
I'm not very sure of where your confusion lies. I did not deduce the value of angle E as per what you said. Instead what I did was draw a line through E parallel to AB and CD and using the alternate angle theorem, I got angle E = 30+30=60 degrees. Does this solution make things clearer for you? Let...
- by saurabhkamal1981
Sat Dec 04, 2010 3:33 am- Forum: Problem Solving
- Topic: Hi All, Please help.
- Replies: 3
- Views: 1359
Hi All, Please help.
Hi Instructors, Please help in the following question, which i encountered while practicing BTG practice questions. I have attached the image and the answer options are as follows:- What is the perimeter of ABCDE ? A). 36 + 6 sqrt 3 B). 48 C). 36 + 8 sqrt 3 D). 36 + 12 sqrt 3 E). 60 Answer is (E), b...
- by saurabhkamal1981
Sat Dec 04, 2010 1:37 am- Forum: Problem Solving
- Topic: Hi All, Please help.
- Replies: 3
- Views: 1359
Because the underlined part is a modifier after a comma it really has to be that present tense verb "leading". For B to be right, then, you'd need to have "more delays" since "delay" itself is singular and we're adding to it so it has to be plural. So B is out and E is...
- by saurabhkamal1981
Mon Nov 29, 2010 10:06 pm- Forum: Sentence Correction
- Topic: Hi Experts,
- Replies: 4
- Views: 2094
The recent surge in the number of airplane flights has clogged the nation’s air-traffic control system, to lead to 55 percent more delays at airports, and prompts fears among some officials that safety is being compromised. (A) to lead to 55 percent more delays at airports, and prompts (B) leadin...
- by saurabhkamal1981
Mon Nov 29, 2010 10:02 pm- Forum: Sentence Correction
- Topic: Hi Experts,
- Replies: 4
- Views: 2094
Hi Experts,
Hi Experts, Need your help in the following question of OG-12 (Q.94). I also researched and got the following links. The recent surge in the number of airplane flights has clogged the nation’s air-traffic control system, to lead to 55 percent more delays at airports, and prompts fears among some o...
- by saurabhkamal1981
Mon Nov 29, 2010 5:12 am- Forum: Sentence Correction
- Topic: Hi Experts,
- Replies: 4
- Views: 2094