There are 36 pieces of building blocks in a bag: 9 each of blue, green, red, and yellow. Four pieces are chosen at random. Identify the probability that all four of the pieces are red.
4/8415
12/935
8/19,635
2/935
2 answers
9/36 * 8/35 * 7/34 * 6/33 = 2/935
3/52