+0  
 
+1
123
2
avatar+502 

 

i got 66, i'm not sure

 Jun 10, 2021
edited by mworkhard222  Jun 10, 2021
 #1
avatar+35061 
+1

Pick any two points to form a line:

12 C 2 = 66     Correct !

 

= 12 ! / (2! 10!)

 Jun 10, 2021
 #2
avatar+502 
0

ok thianks!

mworkhard222  Jun 10, 2021

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