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TCS Other Question

A drawer holds 4 red hats and 4 blue hats. What is the probability of getting exactly three red hats or exactly three blue hats when taking out 4 hats randomly out of the drawer and immediately returning every hat to the drawer before taking out the next?
A. 1/2
B. 1/8
C. 1/4
D. 3/8
f(f(n))+f(n)=2n+3.
f(0)=1.
find f(2012).

a)2011 b)2013 c)4095 d)2012