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Probability

There is a 10% chance that it won't snow all winter long. There is a 20% chance that schools will not be closed all winter long. What is the greatest possible probability that it will snow and schools will be closed during the winter? (A) 55% (B) 60% (C) 70% (D) 72% (E) 80% OA: E need an approach to...

by 800GMAT

Mon Nov 05, 2007 6:36 pm
Forum: Problem Solving
Topic: Probability
Replies: 4
Views: 1896

Some relevant properties:

by 800GMAT

Fri Nov 02, 2007 2:49 pm
Forum: Problem Solving
Topic: GMAT Prep Geometry Question
Replies: 15
Views: 11663

For a prime number k, there is no factor p such that 1<p<k

so f(3)= 1,2 hence 2
f(5)=1,2,3,4 hence 4 and so on

thus the f(p) would always be p-1

by 800GMAT

Thu Nov 01, 2007 6:31 pm
Forum: Problem Solving
Topic: number properties brain damaging thing
Replies: 2
Views: 1373

gmatguy16 wrote:imo e,
a and b are not sufficient,even together they are not sufficient....
a=5,b=5 and c=5 ...in that case ab/c=5
a=1,b=1 and c=1 in that case ab/c=1
Thanks!! :D

by 800GMAT

Tue Oct 30, 2007 6:26 pm
Forum: Data Sufficiency
Topic: DS 1
Replies: 4
Views: 1458

gabriel wrote:People please post the questions in the right section ... moved to the DS section

sorry about that.. :wink:

by 800GMAT

Tue Oct 30, 2007 6:26 pm
Forum: Data Sufficiency
Topic: DS 1
Replies: 4
Views: 1458

DS 1

Is ab/c = 1?

1. a/c = 1
2. b/c = 1

by 800GMAT

Mon Oct 29, 2007 10:41 am
Forum: Data Sufficiency
Topic: DS 1
Replies: 4
Views: 1458

It is not specified any mutual exclusion in the Question. The employee of one prj can be a part of another project tooo..... I would go for E. by the way what is the OA??? Here overlap does not matter, just the number of employees that are assigned For ex even if there are just 20 employees, the as...

by 800GMAT

Tue Oct 16, 2007 11:21 am
Forum: Data Sufficiency
Topic: DS - Median
Replies: 4
Views: 1480
by 800GMAT

Mon Sep 24, 2007 10:31 am
Forum: Problem Solving
Topic: Manhattan Challenge question
Replies: 7
Views: 1411

take x=-2

The sq root of (-(-2)l-2l) = 2
this value is -(-2) = -(-x)

by 800GMAT

Thu Sep 20, 2007 5:22 pm
Forum: Problem Solving
Topic: GMAT Prep Questions
Replies: 14
Views: 2239

Re: Confusing SC question

In B, I don't think "it" unambiguously refers to a noun. In such sentences 'it' need not have a pronoun reference Following are examples from OG: 1.It is possible that Native Americans originally migrated to the Western hemisphere over a bridge of land that once existed between Siberia and Alaska 2...

by 800GMAT

Mon Sep 10, 2007 11:32 am
Forum: Sentence Correction
Topic: Confusing SC question
Replies: 5
Views: 1294

This is a OG11 question-102

subject(Beatrix Potter) and verb(capitalized) are too far away--OG prefers the subject and the verb to be as close as possible

by 800GMAT

Mon Sep 10, 2007 10:10 am
Forum: Sentence Correction
Topic: 1000 SC #162
Replies: 9
Views: 12726

givemeanid wrote:The smallest value of x^n where x>1 and n>0 is 1.
how can u conclude the above.............??

by 800GMAT

Fri Aug 17, 2007 8:16 am
Forum: Problem Solving
Topic: More from GMAT pRep
Replies: 3
Views: 1396

got it.....thnkx
:)

by 800GMAT

Fri Aug 17, 2007 8:03 am
Forum: Problem Solving
Topic: og 11ed problem
Replies: 9
Views: 1936

beny, one question----what does 5! denote...........

by 800GMAT

Thu Aug 16, 2007 3:36 pm
Forum: Problem Solving
Topic: og 11ed problem
Replies: 9
Views: 1936

here..lemme post the question

by 800GMAT

Thu Aug 16, 2007 3:31 pm
Forum: Problem Solving
Topic: og 11ed problem
Replies: 9
Views: 1936