Can Anyone Explain How To Do This Problem Please?! 17^C 4
Ill write it in the reply
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OpenStudy (anonymous):
|dw:1336415195390:dw|
OpenStudy (anonymous):
OpenStudy (anonymous):
????
jimthompson5910 (jim_thompson5910):
n C r = (n!)/(r!(n-r)!)
17 C 4 = (17!)/(4!*(17-4)!)
17 C 4 = (17!)/(4!*13!)
17 C 4 = (17*16*15*14*13!)/(4!*13!)
17 C 4 = (17*16*15*14)/(4!)
17 C 4 = (17*16*15*14)/(4*3*2*1)
17 C 4 = (57120)/(24)
17 C 4 = 2380
OpenStudy (anonymous):
ooohhhh I get t thank you so much!
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jimthompson5910 (jim_thompson5910):
sure thing
OpenStudy (anonymous):
do you do the same thing even if its a different letter?
jimthompson5910 (jim_thompson5910):
If it's a P instead of a C, then no
OpenStudy (anonymous):
Ok so how would you work a P Example 12^P 5
jimthompson5910 (jim_thompson5910):
n P r = (n!)/((n-r)!)
12 P 5 = (12!)/((12-5)!)
12 P 5 = (12!)/(7!)
12 P 5 = (12*11*10*9*8*7!)/(7!)
12 P 5 = 12*11*10*9*8
12 P 5 = 95040
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OpenStudy (anonymous):
Ok thank you you tought it better than my teacher!