a probability question?

Question

If you have 3 coins and put masking tape on each side.and mark one coin with a on one side and b on the other. Mark the second with a and c. and the third with b and c. flipping all the coins, what are the odds that at least two coins will match?

Answer 1

There are 2*2*2 = 8 possible ways the coins will fall. There are two possible ways that there is no match: acb and bac. The rest have two coins that match. Therefore odds are 6/8 that two coins will match.

Answer 2

P(2 coins match) = 1 - P(no coins match)
P(2 coins match) = 1 - 2/8 = 3/4