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This is a modification of one of the problems already posted. I am trying to understand how to solve these types of problems. A Four digit safe code does not contain the digits 1 and 4 at all. What is the probability that it has at least three even digit? Answer and explanation of how to solve is appreciated.

I choose E. P(Female) and P(Post Graduate) are not independent events OA please?

I would say A. What's the OA?

Please explain how do we solve this question. Also are there any number properties that helps solve this question quicker? Thanks

Consider the two cases 1. x is positive => sqrt(x^2)/x = x/x = 1 2. x is negative => sqrt(x^2)/x = x/(-x) = -1 Note: sqrt(x^2) denotes the non negative sqrt of x^2 That's why the answer is E.

Could someone please explain how do we solve this question.

Moshin would you mind sharing your score from GMATPrep 1?

OA is B. But how can we use "whose" for a river?

Answer and explanation please

Answer and explanation please

I am not sure what part of the world you are located in, but I highly recommend reading Cliff's Verbal Review for Standardized Tests book: http://www.amazon.com/gp/product/0822020343/sr=8-1/qid=1150416901/ref=sr_1_1/103-2510906-5581400?%5Fencoding=UTF8

Agree with E

Could you please explain your answer for the following question. I know the OA which I will publish later, but feel that the OA is wrong. Thanks

Could you provide some more informatino on the following formula: (2n-2)!/(n-1)!(n-1)!

How do we derieve 256 as the number of possible moves?