+0  
 
0
56
1
avatar

George flips an unfair coin 7 times. The coin has a 1/4 probability of coming up heads and a 3/4 probability of coming up tails. What is the probability that he flips exactly 3 tails?

 Nov 16, 2020
 #1
avatar+114221 
+1

The probability is  given by :

 

C(7,3)  (1/4)^4 (3/4)^3  =  945 / 16384  ≈  .0577

 

cool cool cool

 Nov 16, 2020

26 Online Users

avatar
avatar
avatar
avatar