+0  
 
-1
406
1
avatar+4116 

Help 12

 Jan 3, 2019
 #1
avatar+111328 
+2

We have

 

C(10,6)(.51)^6 (.49)^4   =  .213  ≈  21%  ⇒ "B"

 

 

cool cool cool

 Jan 4, 2019

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