Question 1100076: Mimi has eight books from the Statistics is Fun series. She plans on bringing two of the eight books with her in a road trip. How many different ways can the two books be selected?
(b) A combination lock uses three distinctive numbers between 1 and 30 inclusive. How many different ways can the sequence of three numbers be selected?
Answer by jorel1380(3719)   (Show Source):
You can put this solution on YOUR website! a)8 books chosen 2 at a time equals 8 choose 2, which equals 28 different ways 2 books can be chosen.
b)30 numbers chosen 3 at a time, no repeats, equals 30 choose 3, or 4,060 different combinations possible
☺☺☺☺
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