A person going to a party was asked to bring 3 different bags of chips. Going...
A person going to a party was asked to bring 3 different bags of
chips. Going to the store, she finds 11 varieties.
How many different selections can she make?
Please write clearly and circle the answer
Homework Answers
ANSWER:
Given that,
3 bags can be chosen from the 11 varieties by 11C3 ways.
Where,
nCr = n! / ( r! * (n-r) !)
Therefore,
11C3 = 11! / (3! * (11-3)!)
= 11! / (3! * 8!)
=( 11 *10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1 ) / ( 3 *2 * 1 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1 )
= 165
165 different selection.
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