Probability

Expert replies

rajatvmittal: Master | Next Rank: 500 Posts; Posts: 110; Joined: Sat Feb 11, 2012 5:01 am; Thanked: 2 times

by rajatvmittal » Wed Oct 10, 2012 7:32 am

HI

Probability is no of desired outcomes / no of total outcomes.

Please guide me on how to compute the no of total outcomes?

should be factor in the arrangements i.e should we calculate by using permutation formula or by using combination formula.

Or if, depending on the prob, either of the two can be used, please guide me how to spot that difference.

Also, i understand that if you are using a particular way to compute the denominator, use the same to calculate the numerator. (method - Permutation or Combination)
I know it is a very basic question but I often get confused on this one!.

thanks
Rajtt

Source: Beat The GMAT — Problem Solving | Wed Oct 10, 2012 7:32 am

adthedaddy: Master | Next Rank: 500 Posts; Posts: 167; Joined: Fri Mar 09, 2012 8:35 pmFollowed by: 3 members; Thanked: 39 times

by adthedaddy » Wed Oct 10, 2012 7:59 am

Hi Rajat,

Refer this link; it was suggested to me by one of the BTG experts. Its very nice esp to understand Quant in a fundamental way.

https://www.mathsisfun.com/combinatorics ... tions.html
https://www.mathsisfun.com/data/probability.html

Search for the topics you want to understand.

Regards,
Abhijit

"Your time is limited, so don't waste it living someone else's life. Don't be trapped by dogma - which is living with the results of other people's thinking. Don't let the noise of others' opinions drown out your own inner voice. And most important, have the courage to follow your heart and intuition. They somehow already know what you truly want to become. Everything else is secondary" - Steve Jobs

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