Review of Probability

Okay, so this week I am going to review how to work probability problems. Since I already went over this a few weeks ago, it should be very easy. So first, you need to know a few things.

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).

Okay, so now that you know the few notes, I am going to work a few examples for you to better understand.

Example 1: 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 balck, 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 black card = 26/52 = 1/2
• A red club = 0/52 = 0
• A card = 52/52 = 1
• An ace = 4/56 = 1/14

Well that's how you work probability problems. Have a great weekend. Byeeee

--Halie!