Question 438877
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Hi
You are playing roulette at a casino in the United States. 
The wheel has 18 red slots, 18 black slots, and two green slots. 
 38 slots in all, 20 of which are NOT red
In '4 spins' of the wheel..
 P(at least one red) = 1 - P(no red) = 1 - (20/38)^4