Question 1028632
A disc jockey wants to select 5 songs that contain a CD that contains 13 songs. 
How many 5 song selections are possible? Put your answer in the form [XXXX].
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If order does matter, ie, if ABCDE is not the same as ADCEB, and there are no duplicates, then
= 13*12*11*10*9
= 154440
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If order doesn't matter, ie, if ABCDE is the same as ADCEB, and there are no duplicates, then
= 13*12*11*10*9/(5*4*3*2*1)
= 1287
[XXXX]