3. Josh has 18 black socks and 12 white socks. Every morning he chooses one sock at random
After he has pulled that one sock out, he chooses another sock at random and wears them!
What is the probability that he ...
a. first chooses a white sock, then a white sock?
b. first chooses a black sock, then a black sock?
c. first chooses a white sock, then a black sock?
d. first chooses a black sock, then a white sock?
e. gets a matching pair?
f. gets a mismatching pair?
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