+0  
 
0
333
1
avatar+282 

i hate fractions

lizagame  May 22, 2017
 #1
avatar+91137 
+1

 

 There are only two ways of getting $25.....chose a $5 bill the first time  and a $20 bill the second time....or   vice-versa

 

So.....the total probability is   (2 /11) * (4/11)  +  (4/11) (2/11)   =   8/121  + 8/121    =   16 / 121

 

 

cool cool cool

CPhill  May 22, 2017

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