(New page: Category:MA375Spring2009Walther '''Back''') |
|||
Line 1: | Line 1: | ||
[[Category:MA375Spring2009Walther]] | [[Category:MA375Spring2009Walther]] | ||
'''[[MA 375 Spring 09 HW 5|Back]]''' | '''[[MA 375 Spring 09 HW 5|Back]]''' | ||
+ | |||
+ | I am confused with what numbers I should put on top of my probability fraction. I have three numbers: # of ways for someone to choose 7 #s from 80 = C(80,7), # of ways for the computer to choose 11 numbers from 80 = C(80,11), and # of ways someone could have chosen the 7 from the 11 = C(11, 7). I think I understand that the number C(11, 7) is the total number of lottery numbers that are winners. And that the total number of lottery number is C(80, 11), but what do I do with C(80,7)? | ||
+ | |||
+ | ~James Gilmore | ||
+ | |||
+ | I'm not sure if this is right, but my answer was C(11,7)/C(80,7). -Zoe |
Revision as of 12:42, 13 February 2009
I am confused with what numbers I should put on top of my probability fraction. I have three numbers: # of ways for someone to choose 7 #s from 80 = C(80,7), # of ways for the computer to choose 11 numbers from 80 = C(80,11), and # of ways someone could have chosen the 7 from the 11 = C(11, 7). I think I understand that the number C(11, 7) is the total number of lottery numbers that are winners. And that the total number of lottery number is C(80, 11), but what do I do with C(80,7)?
~James Gilmore
I'm not sure if this is right, but my answer was C(11,7)/C(80,7). -Zoe