First Puzzle

This is the first puzzle on the Casual Math Puzzlers blog. If you have a guess at the answer, please post it in the comments section.

There are two poker chips in a bag, one red and one blue. A chip is pulled out of the bag at random, then put back in the bag along with another one of the same color. After this is done seven times, is it more likely that there will be exactly five blue chips in the bag, eight red chips in the bag or are their probabilities the same?