SOLUTION: A student is asked to answer 9 out of 13 questions on an exam.
(a) Classify the problem as a permutation, a combination, or neither.
(a)permutation
(b)combination
(c)neither
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Question 536638: A student is asked to answer 9 out of 13 questions on an exam.
(a) Classify the problem as a permutation, a combination, or neither.
(a)permutation
(b)combination
(c)neither
(b) In how many ways can she select the questions to be answered?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
a) This is a combination since the order does not matter.
b) There are 13 C 9 = (13!)/(9!(13-9)!) = 715 different ways
If you need more help, email me at jim_thompson5910@hotmail.com
Also, please consider visiting my website: http://www.freewebs.com/jimthompson5910/home.html and making a donation. Thank you
Jim
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