7 songs in a program, 13 songs to choose, how many orders can be made for the program?

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7 songs in a program, 13 songs to choose, how many orders can be made for the program?

2006-08-29 07:01:00 · 4 answers · asked by Sam 3 in Science & Mathematics ➔ Mathematics

4 answers

probability is the shi ts?

^^^ go to that question idk how but that may help i think \its the same question ^_^

2006-08-29 07:22:04 · answer #1 · answered by phvxoui 2 · 0⤊ 1⤋

The formula for combinations is:
C(n, r) = n! / [r! Â· (n - r)!]

You have 13 songs counted 7 at a time.
C(13, 7) = 13! / [7! Â· (13 - 7)!]
= 13! / [7! Â· 6!]
= (13 Â· 12 Â· 11 Â· 10 Â· 9 Â· 8) / (6 Â· 5 Â· 4 Â· 3 Â· 2 Â· 1)
= 1716

2006-08-29 14:12:42 · answer #2 · answered by Louise 5 · 0⤊ 0⤋

it is 13C7=
13*12*11*10*9*8*7/1*2*3*4*5*6*7
1716

2006-08-29 14:04:45 · answer #3 · answered by raj 7 · 0⤊ 0⤋

13C7 = (13!)/(7!(13 - 7)!)
13C7 = (13!)/(7! * 6!)
13C7 = 1716

2006-08-29 14:52:00 · answer #4 · answered by Sherman81 6 · 0⤊ 0⤋