+0  
 
0
94
2
avatar+65 

Marvin the fly starts at (0,0) Each step, Marvin moves one unit right or one unit up. He is trying to get to the point (5,7). However, at (4,3) there is a frog that will eat him if he goes through that point. In how many ways can Marvin reach (5,7)?

 

BTW the answer is not 728

 Jul 21, 2020
edited by nicthemathwiz  Jul 21, 2020
edited by nicthemathwiz  Jul 21, 2020
 #1
avatar+65 
+1

ANYONE HERE??? ANYONE GONNA ANSWER ME???

(Sorry if i'm sounding rude but I need the answer in 5 min or less.

 Jul 21, 2020
 #2
avatar
0

You subtract C(7,2)*C(5,2), which gives you C(12,5) - C(7,2)*C(5,2) = 582.

 Jul 21, 2020

17 Online Users

avatar