Search found 9 matches
By looking at what is being asked we can see - abc/def = a/d*b/e*c/f
a/d = a/b*b/c*c/d = 1/3*2*1/2 = 1/3
b/e = b/c*c/d*d/e = 2*1/2*3= 3
c/f = c/d*d/e*e/f = 1/2*3*1/4 =3/8
abc/def = 1/3*3*3/8 = 3/8
Answer: A
- by gary391
Thu Jun 15, 2017 10:20 am- Forum: Problem Solving
- Topic: if a/b = 1/3, b/c=2, c/d = 1/2, d/e=3, and e/f=1/4 then find
- Replies: 6
- Views: 4816
If X/|X| < X which of the following must be true about X?
If X/|X| < X which of the following must be true about X?
A) x>1
(B) x>−1
(C) |x|<1
(D) |x|=1
(E) |x|^2>1
B
- by gary391
Thu Jan 12, 2017 8:30 pm- Forum: Problem Solving
- Topic: If X/|X| < X which of the following must be true about X?
- Replies: 2
- Views: 3029
Using combination i.e. "selection" logic. No. of ways to select Subset that doesn't contain t = (All subset) - (Subset always contains t) ---(1) All Subset = 5C5 + 5C4 + 5C3 + 5C2 + 5C1 = 1 + 5 + 10 + 10 + 5 = 31 Subset always contains t = 4C4 +4C3 + 4C2 + 4C1 = 1 + 4 + 6 + 4 = 15 From (1)...
- by gary391
Tue Aug 23, 2016 10:26 am- Forum: Problem Solving
- Topic: Sub sets probability
- Replies: 9
- Views: 5400
In order for 4 numbers to have an average of 78, each number should be at least 78. Using same logic for 5 number to have an average of 80, each number should be at least 80. Thus, for both the averages to be equal, the student should score 88 in the 5th test. ---------------- |78|78|78|78| ?|=> Ave...
- by gary391
Fri Aug 19, 2016 9:35 pm- Forum: Problem Solving
- Topic: avg
- Replies: 5
- Views: 3514
For a quadratic equation: ax2 + bx + C = 0. A real number x will be called a solution or root if it satisfies the equation. Since for the given problem, we can calculate the roots as x = 1 and x = 5. Now, we are asked to identify which of the options will have the common root. Therefore, by just plu...
- by gary391
Thu Jul 07, 2016 7:05 pm- Forum: Problem Solving
- Topic: common root
- Replies: 5
- Views: 6656
Statement 1 - Not Sufficient - No information is provided regarding the maximum capacity of the bucket. Statement 2 Let the bucket capacity = x According to the question, Bucket is half full = x/2 (Given) Adding 3 liters of water = x/2 + 3 Now, Bucket is half full + 3 liters of water added = Amount ...
- by gary391
Sun Oct 07, 2012 5:35 am- Forum: Data Sufficiency
- Topic: OG 12 | Algebric translations
- Replies: 4
- Views: 1497
We also have a formula for solving these type of problems: Formula: If a Jar contains 'a' litres of liquid 'A', and if 'b' litres is withdrawn and replaced by liquid 'B',... Now again a if 'b' litres of mixture is withdrawn and replaced by liquid B, and the operation is repeated 'n' number of times ...
- by gary391
Sun Mar 13, 2011 8:00 am- Forum: Problem Solving
- Topic: Alligation?
- Replies: 5
- Views: 2534
- by gary391
Sat Mar 12, 2011 7:45 pm- Forum: GMAT Math
- Topic: Absolute Inequality fundamentals
- Replies: 3
- Views: 1610
How to balance Quant & Verbal sections during Prepartion
Hi All, I have been studying quant for sometime (Almost reviewed all the topics). My approach so far: Quant Section: 1. Review one quant topic each day. - practice ~10 problems. - This exercise took a lot of time. <Yet to start with actual OG -12 questions>. 2. Verbal - Not yet started I am currentl...
- by gary391
Sun Feb 27, 2011 10:20 am- Forum: GMAT Strategy
- Topic: How to balance Quant & Verbal sections during Prepartion
- Replies: 1
- Views: 1031