Probability Review

This weekend I am going to review with you all the concept of probability. We were off of school all this week so it is time for a review lesson. Remember, there are a few things that you need to know about probability.

Notes:
• When events are mutually exclusive, then they cannot happen at the same time.
• When finding the probably of event A or event B follow the formula:
P (A or B) = P (A) + P (B) – P (A & B).
• When you find the probability of event A or event B and the events are mutually exclusive, then follow the formula: P (A or B) = P (A) + P (B).

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 card is:

a. A diamond = 1/2
b. A red face card = 2/13
c. A jack = 1/13
d. A black heart = 0
e. A red or black card = 1

-Braxton