Question: A special deck of 16 cards has 4 that are blue, 4 yellow, 4 green, and 4 red. The four cards of each color are numbered from one to four. A single card is drawn at random. Find the following probabilities.
a. The probability that the card drawn is a two or a four.
b. The probability that the card is a two or a four, given that it is not a one.
c. The probability that the card is a two or a four, given that it is either a two or a three.
d. The probability that the card is a two or a four, given that it is red or green.