SOLUTION: An amusement park has 20 different rides. You want to ride at least 15 of them. How many different combinations are there to consider?

SOLUTION: An amusement park has 20 different rides. You want to ride at least 15 of them. How many different combinations are there to consider?

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Question 357338: An amusement park has 20 different rides. You want to ride at least 15 of them. How many different combinations are there to consider?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
nCr=20C15=20!/((20-15)!15!=20!/(5!*15!)=15504
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Ed
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