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This weekend I am going to teach you all how to find probabilities. This lesson is just simple probabilities, like finding the probability of either one or two events. There are a few things that you need to know before I show you all an example.

Notes:
• If two events are mutually exclusive, then they cannot happen at the same time.
• P(A or B) = P(A) + P(B) - P(A & B)
• If the events are mutually exclusive, then P(A or B) = P(A) + P(B)

Now I will show you all an example of a probability problem.

Example: A standard deck of cards consists of 52 cards, with 13 cards in each of four suits (clubs, spades, diamonds, and hearts). Clubs and spades are always black, while diamonds and hearts are always red. The face cards are the jacks, queens, and kings. If the deck is shuffled correctly, what is the probability that the top card is:

a. a black diamond: 0/52 = 0

b. a face card: 12/56 = 3/14

c. an ace: 4/56 = 1/14


-Braxton