SOLUTION: A computer with an old processor locks up if more than 4 applications are running simultaneously. If the owner has 20 applications stored in his program file, how many different s

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Question 347881: A computer with an old processor locks up if more than 4 applications are running simultaneously. If the owner has 20 applications stored in his program file, how many different sets of 4 can he run, so that his computer does not lock up?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
There are 20 choices for the first slot, 19 for the second, 18 for the third, and 17 for the fourth. Multiply them out to get

20*19*18*17 = 116280


So there are 116280 different ways to run 4 programs selected from a pool of 20 programs.


If you need more help, email me at jim_thompson5910@hotmail.com

Also, feel free to check out my tutoring website

Jim