A box contains 4 bolts. Two of them, labeled #1 and #2, are 5 mm in diameter, and two of them, labeled #3 and #4, are 7 mm in diameter. Bolts are randomly selected until a 5 mm bolt is obtained. The outcomes are the sequences of bolts that can be selected. So one outcome is 1, and the other is 342.
a.)list the equally likely outcomes.
b.)what is the probability that both sides are 7mm?
c.)what is the probability that one bolt is 5mm and the other is 7mm?