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The question goes something like this...
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
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