The question goes something like this...(adsbygoogle = window.adsbygoogle || []).push({});

What is the probability of an E being one of the 4 randomly chosen letters from the word ENERGISE?

This is how i did it (the book says its wrong):

ENERGISE ==> 3 Es, 5 Non-Es (partitioning)

hence: (3c1*5c3)/(8c4)

the book has 55/56....

Cheers

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# Simple combinatorics q

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