16-1 Probability

So this week I am going to explain how to work probability problems. They are superrr easy, but first I need to tell you a few basic things that you might need to knoww.

• Probability is from 0-1, which means 0 is the probability it will not happen and 1 is the probability it will definetaly happen.
• There is only one formula you need to know when working these types of problems. That formula is : 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 of problems you will see.

So now that you know all that, I will work a few examples for you.

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

• In a deck of 52 cards there are 26 total black cards.
• So you would put 26/52.
• Which that then reduces into 1/2 and that is your answer.

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

• In a deck of 52 cards all they have are black and red cards.
• So you would put 52/52.
• Which reduces into 1. So you then know that your chances of getting a black or red card will definetaly happen.

And that is how you work probability problems. So that's it for this weeek. BYEEE :)

--Halie.