Search found 28 matches


The formula works. Just subtract the mean from each of the two new terms - add up the difference and divide by the total number of new terms. This will give you the change in mean. Then add it to the old mean to get the new mean. Basically what you are doing here is that, you are calculating how muc...

by RSK

Sat Jul 21, 2012 9:51 pm
Forum: Problem Solving
Topic: Change the Mean Formula
Replies: 8
Views: 24600

You can find the questions from most top schools here:

http://elite-essays.com/blog/letter-of- ... -fall-2010

But I don't see a word limit for INSEAD.

by RSK

Sun Mar 11, 2012 6:42 am
Forum: Ask an MBA Admissions Consultant
Topic: INSAED Reference Questions
Replies: 1
Views: 3316

Sorry I don't understand the solution. What do you mean by 'mod'?

by RSK

Tue Feb 28, 2012 10:38 pm
Forum: GMAT Math
Topic: Number properties, divisibility, GCF
Replies: 4
Views: 1570

Hi Sanju,

Thanks for answering my question!
A is sufficient on its own but B is not sufficient on its own so the answer is A.

by RSK

Sat Feb 25, 2012 5:03 am
Forum: GMAT Math
Topic: Algebra
Replies: 8
Views: 7377

Algebra

Hi guys,

Does anyone know how to solve such a problem quickly?

Joanna bought only $0.15 stamps and $0.29 stamps. How many $0.15 stamps did she buy?
(1) She bought $4.40 worth of stamps.
(2) She bought an equal number of $0.15 stamps and $0.29 stamps.

Thanks!

by RSK

Sat Feb 25, 2012 2:03 am
Forum: GMAT Math
Topic: Algebra
Replies: 8
Views: 7377

Number properties

Hi guys,

Another confusing number properties question. Please help me solve this.

The numbers x and y are not integers. The value of x is closest to which integer?

1) 4 is the integer that is closest to x+y.
2) 1 is the integer that is closest to x-y.

by RSK

Mon Feb 20, 2012 8:34 am
Forum: GMAT Math
Topic: Number properties
Replies: 1
Views: 974

Number properties, divisibility, GCF

Hi guys,

Is there a quick way to solve this question? The method I used involved a lot of work and time.

If x and y are positive integers such that x=8y+12, what is the greatest common divisor of x and y?

1) x=12u, where u is an integer.
2) y=12z, where z is an integer.

by RSK

Mon Feb 20, 2012 8:31 am
Forum: GMAT Math
Topic: Number properties, divisibility, GCF
Replies: 4
Views: 1570

Inequalities, Absolute Value, Data sufficiency

Can someone please help me solve this? I have no idea how to do this. Thanks!

If y>=0, what is the value of x?

1) |x-3| >= y
2) |x-3| <= -y

by RSK

Mon Feb 20, 2012 8:24 am
Forum: GMAT Math
Topic: Inequalities, Absolute Value, Data sufficiency
Replies: 3
Views: 1664

Hi Mick, Statement 1 should be insufficient. This is why: 75 - 41 = 34. We could make a list: 4, 6, 7, 8, 9 and 41 = 75 in which case country A would have less than 10 members. Or we could make a list: 3, 6, 7, 8, 10, 41 = 75 in which case country A has 10 members. So statement 1 is insufficient. Th...

by RSK

Mon Feb 20, 2012 5:52 am
Forum: GMAT Math
Topic: Word Problem
Replies: 3
Views: 1275

Wow this is amazing. Thank you so much!

by RSK

Mon Feb 20, 2012 5:34 am
Forum: Data Sufficiency
Topic: Standard Deviation
Replies: 2
Views: 1317

Thank you Brent!

I did it this way: Total no. of outcomes = 1000 x 800
Favourable outcomes = 60 x 1
Probability = 60/800000 = 3/40000

Is this method correct?

by RSK

Mon Feb 20, 2012 5:07 am
Forum: GMAT Math
Topic: Probability!!
Replies: 3
Views: 1553

Data sufficiency

Hi guys, Can someone explain this question. Thank you! Are at least 10% of the people in Country X who are 65 years old or older employed? 1) In Country X, 11.3 percent of the pop is 65 yrs old or older. 2) In Country X, of the pop 65 years old or older, 20% of the men and 10% of the women are emplo...

by RSK

Sat Feb 18, 2012 9:16 pm
Forum: GMAT Math
Topic: Data sufficiency
Replies: 1
Views: 1018

Probability!!

Hi guys, Although I did arrive at the right answer I am not so sure of my method. Can someone tell me how to solve this. Thanks! A certain junior class has 1000 students and a certain senior class has 800 students. Among these students, there are 60 sibling pairs, each consisting of 1 junior and 1 s...

by RSK

Sat Feb 18, 2012 9:01 pm
Forum: GMAT Math
Topic: Probability!!
Replies: 3
Views: 1553

Word Problem

Hello, Can someone help me solve this: Six countries in a certain region sent a total of 75 representatives to an international congress, and no two countries sent the same number of representatives. Of the six countries, if Country A sent the second greatest number of representatives, did Country A...

by RSK

Sat Feb 18, 2012 9:00 pm
Forum: GMAT Math
Topic: Word Problem
Replies: 3
Views: 1275

Word Problem

Hi guys, I need help with this question: If Bob produces 36 or fewer items in a week, he is paid x dollars per item. If Bob produces more than 36 items in a week, he is paid x dollars per item for the first 36 items and 1.5 times that amount for each additional item. How many items did Bob produce l...

by RSK

Sat Feb 18, 2012 8:59 pm
Forum: GMAT Math
Topic: Word Problem
Replies: 1
Views: 991