A deck of 28 cards contains 6 blue cards, 13 red cards, and 9 yellow cards. What is the probability of randomly drawing a blue card from this deck?
The probability P is actually formulated as "the successful outcomes S" over "the total number of possible outcomes T," that is
P = S/T
You are expecting to draw a blue card. Therefore the probability will be
P(one blue card) = 6/28 = 3/14