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by moron » Tue Nov 10, 2015 6:39 pm
Can anyone suggest when it is better to use Combination nCr vs when it is better to use counting method ? Examples will be be appreciated.
I finally get the answer but it consumes lot of time. This happens for bit difficult questions.
Thanks
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by Brent@GMATPrepNow » Tue Nov 10, 2015 9:06 pm
We have a free video that answers that question - https://www.gmatprepnow.com/module/gmat- ... /video/788

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by [email protected] » Wed Nov 11, 2015 9:50 am
Hi m,

If you've come across specific prompts that have taken you a long time to solve (or have given you any type of trouble), then you should post them here. You would probably find it beneficial to watch the Experts and other Users work through those questions.

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by Jim@StratusPrep » Wed Nov 11, 2015 11:56 am
You will likely find this helpful: https://gmatanswers.com/posts/gmat-permu ... mbinations

This is not the traditional way these subjects are taught.
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