There are 68 marbles 1/2 red and 1/2 blue. Allison takes 5 redand 7 blue marbles

There are 68 marbles 1/2 red and 1/2 blue. Allison takes 5 redand 7 blue marbles. She than takes an additional 17 marbles fromthe jar. What is the least number of marbles that must be blue inorder for there to be more red marbles than blue among theremaining marbles in the jar?