Search found 39 matches
- by FLUID
Fri Apr 19, 2013 8:48 pm- Forum: Let's Meet Up
- Topic: GMAT study group in Bay Area
- Replies: 2
- Views: 1696
Q.1 The I Eta Pi fraternity must choose a delegation of three senior members and two junior members for an annual interfraternity conference. If I Eta Pi has 12 senior members and 11 junior members, how many different delegations are possible? Explanation: 3 out of 12 senior members is 12C3 2 out o...
- by FLUID
Wed Nov 14, 2012 11:24 pm- Forum: Problem Solving
- Topic: Probabilty
- Replies: 2
- Views: 1293
I was wondering whether there is any elegant way of handling the question below. John prepared 4 different letters to be sent to 4 different addresses. For each letter, he prepared an envelope with its correct address. If the 4 letters are to be put into the 4 envelopes at random, what is the proba...
- by FLUID
Wed Nov 14, 2012 11:38 am- Forum: Problem Solving
- Topic: Letter combination
- Replies: 1
- Views: 1170
can anyone explain this to me? if x is say 1 and z is 2, wouldn't the arithmetic average be greater than z? You are contradicting to what it says in first statement. please read again. 1) On the number line, z is closer to 10 than it is to x. Z is closer to 10 than it is to x => if Z is 2 units awa...
- by FLUID
Tue Nov 13, 2012 11:47 pm- Forum: Data Sufficiency
- Topic: DS
- Replies: 5
- Views: 1437
If x and y are positive integers, is (2+x) / (3+y) greater than (2+y)/(3+x)? 1) x+y = 3 2) x > y This is from question pack 1 of gmatprep. There is an algebra way of doing this but I was wondering if the plug-in approach or any other approaches are useful here? Answer is B Explanation: Statement 1:...
- by FLUID
Tue Nov 13, 2012 11:34 pm- Forum: Data Sufficiency
- Topic: Hard looking algebra problem
- Replies: 5
- Views: 1757
Find the number of trailing zeros in the product of (1^1)*(5^5)*(10^10)*(15^15) *(20^20)*(25^25)………. *(50^50). A) 10^150 B) 10^200 C) 10^250 D) 10^245 E) 10^225 C We have a trailing zero when we 2 is multiplied by 5. In the product: (1^1)*(5^5)*(10^10)*(15^15) *(20^20)*(25^25)*...*(50^50) the...
- by FLUID
Tue Nov 13, 2012 11:21 pm- Forum: Problem Solving
- Topic: Find the number of trailing zeros in the product of
- Replies: 3
- Views: 2764
please post right questionmicrozof wrote:If (15/Y) + (X/3) = 18 then (5/Y) + X = ? ...... please show the calculation.
- by FLUID
Sun Nov 11, 2012 8:35 pm- Forum: Problem Solving
- Topic: Algebra, please help.
- Replies: 5
- Views: 1277
But according what you have stated, the order seems to matter. But order should not matter here. Assuming that in "[P(B or R first AND not B or R second)", we get B first & anyone second and in "P(neither B nor R first AND anyone second)]", we get anyone first and B second. ...
- by FLUID
Sun Nov 11, 2012 11:14 am- Forum: Problem Solving
- Topic: Probability Concept doubt
- Replies: 4
- Views: 3138
Another question: At a certain hospital, 75% of the interns receive fewer than 6 hours of sleep and report feeling tired duringtheir shifts. At the same time, 70% of the interns who receive 6 or more hours of sleep report no feelings of tiredness. If 80% of the interns receive fewer than 6 hours of...
- by FLUID
Sun Nov 11, 2012 11:01 am- Forum: Problem Solving
- Topic: set problem 2
- Replies: 6
- Views: 1584
The below question is a very easy question, but I am having a conceptual error which I hope someone can shed light on. There are 8 employees including Bob and Rachel. If 2 employees are to be randomly chosen to form a committee, what is the probability that the committee includes both Bob and Rache...
- by FLUID
Sun Nov 11, 2012 10:51 am- Forum: Problem Solving
- Topic: Probability Concept doubt
- Replies: 4
- Views: 3138
The price for lunch for 15 people is $207, including 15% gratuity for service. What was the average price per person, EXCLUDING the gratuity? a. $11.73 b. $12 c. $13.80 d. $14 e. $15.87 This is how I am solving this question Finding 15% of 207 15/100 x 207 = $31.05 207 - 31.05 = $175.95 <= price fo...
- by FLUID
Sat Nov 10, 2012 8:53 pm- Forum: Problem Solving
- Topic: Help needed with OG question 135
- Replies: 7
- Views: 1635
In a garden, seven flowers are to be arranged around a circular walk. Two arrangements of the flowers are considered different only when the positions of the flowers are different relative to each other. What is the total number of different possible arrangements of the flowers? I obtained this que...
- by FLUID
Sat Nov 10, 2012 8:45 pm- Forum: Problem Solving
- Topic: Flowers in the Garden Permutatin
- Replies: 2
- Views: 1174
Q1)If the integers a and n are greater than 1 and the product of the first 8 positive integers is a multiple of a^n , what is the value of a? 1) a^n = 64 2) n = 6 Thanks Explanation: a>1 and n > 1 1 * 2 * 3 * 4* 5* 6* 7* 8 = X( a ^ n) => 1 * (2 ^ 7 )* (3 ^ 2) * 5 * 7 = X ( a ^ n) Statement 2: n = 6...
- by FLUID
Sat Nov 10, 2012 10:39 am- Forum: Data Sufficiency
- Topic: DS - Topic Factors ; Help needed GMAT around the corner
- Replies: 1
- Views: 896
12. If the region enclosed by the y-axis, the line y=2 , and the curve y=sqrt(2) is revolved about the y-axis, the volume of the solid generated is (A) 32PI/5 (B) 16PI/3 (C) 16PI/5 (D) 8PI/3 (E) PI I am thinking it would be a Hemisphere with radius 2. => 2/3 * pi * (2)^3 = 16PI/3 (Choice B). can yo...
- by FLUID
Wed Nov 07, 2012 11:39 pm- Forum: Problem Solving
- Topic: region enclosed by the y-axis
- Replies: 13
- Views: 10192
An equilateral triangle ABC is inscribed in circle ,If length of arc ABC is 24, What is approximate diameter. A 11 B 13 C 15 D 22 E 25 As triangle ABC is equilateral, arc ABC is 2/3 of the circumference of the circle. Arc ABC = 2/3 * Circumference 24 = 2/3 * Circumference Circumference = 36 Circumf...
- by FLUID
Wed Nov 07, 2012 11:31 pm- Forum: Problem Solving
- Topic: Diameter
- Replies: 9
- Views: 1662