Probability

Question 1

What is probability ?

Answer 1

The chance or likelihood that an event will occur

Question 2

How can you express probability in a formula ?

Answer 2

(Desired or winning outcomes )/ possible outcomes

Question 3

What is the highest probability an event can have ?

Answer 3

1, 100% , 1/1

Question 4

What is the lowest probability an event can have ?

Answer 4

0, 0%, 0/1

Question 5

How do you calculate the probability that an event wont occur ?

Answer 5

1 - the probability that it WILL occur

Question 6

Probability of winning + probability of losing =

Answer 6

1

Question 7

How do you calculate the amount of numbers in a set if the set includes those two numbers

Answer 7

Difference of the two numbers + 1

Question 8

How do you solve an “and” probability?

Answer 8

Multiply the probabilities of each event together

Question 9

What is the butterfly effect when it comes to probability ?

Answer 9

The probability of subsequent selections will be affected

Question 10

Be careful of problems that imply a sequence of events and ask for the probability of a single event ….

Answer 10

Consider the sequence of events that would have to occur for that single event to occur

Question 11

How do you solve or probabilities?

Answer 11

Add the probabilities of the individual events involved

Question 12

Probability questions that ask about “more than” , “less than” or “at least” signify what?

Answer 12

The question is an OR probability

Question 13

What is the equation for or probabilities that can occur together i.e. pick something white, or a t shirt , and their is a white t shirt that can be selected

Answer 13

Can occur together= OR - AND

Question 14

How do you determine the probability that a certain outcome occurs at least once?

Answer 14

Subtract the probability that the event never occurs from one

Question 15

When you have probabilities problems where multiple scenarios can lead to a desired outcome what do you do?

Answer 15

Add the probabilities of each scenario

Question 16

How do you solve probability questions where various selections must be different?

Answer 16

Subtract the probability that the selections are the same from one

1- same

Question 17

If one or more path can lead to a desired outcome what should you do?

Answer 17

Add their probabilities

Question 18

What tool can be used for complex desires scenarios?

Answer 18

Tree diagrams

Question 19

When do you use tree diagrams for probability problems ?

Answer 19

When the problem states a desires outcome or says what it chosen

Question 20

What key words let you know a question is a probability/combinatorics question?

Answer 20

Ordered, arranged, scrambled, aligned

Question 21

How do you solve probability/ combinatoric questions?

Answer 21

Divide the number of desired arrangements by the total number of possible arrangements

Question 22

How do you approach probability combination problems with “of phrases”?

Answer 22

Divide the winning combinations by the total number of possible outcomes

*of phrases should be treated as combinations