Probability

Things you need to know:

• Probability is from 0-1, which means 0 is the probability it will not happen and 1 is the probability it will happen.
• Formula: P(event A) = favorable outcomes/total outcomes
• Most probability problems involve a standard deck of cards or the rolling of one or two dice. Those are the most common types.

Example 1: Out of a standard deck of 52 cards, what is the probability that you will get a red card.

• First you need to know how many red cards are in a deck of 52 cards.
  
• There are 26 red cards in a deck of 52 cards.
• So you would just put that as a fraction: 26/52.
• After that you can reduce it. It reduces to 1/2.
• Final answer: 1/2.

Example 2: Out of a standard deck of 52 cards what is the probability that you will get a black diamond.

• First you must realize that there is not a black diamond in a 52 deck of cards.
• It does not exist.
• So since it does not exist you would put 0/52.
• 0/52 will give you 0.
• 0 is your final answer.

-Amber :)