Probability Quiz Review

Probability Quiz Review

By Brittany Johnson

Probability Scales

• Certain - if an event will always happen.

• Most Likely - if an event has a good chance of happening.

• Even Chance - if an event has an equally likely of happening.

• Less Likely - if an event has a poor chance of happening

• Impossible - if an event will never happen or has no chance of happening

Multiple Choice

An event has a 100% chance of happening. This event is ___.

• Impossible

• Unlikely

• Likely

• Certain

Multiple Choice

An event has a 75% chance of happening. This event is ___.

• Impossible

• Unlikely

• Likely

• Certain

Multiple Choice

An event has a 0% chance of happening. This event is ___.

• Impossible

• Unlikely

• Likely

• Certain

Multiple Choice

Choosing the letter "t" from the word "mathematics"

• impossible

• unlikely

• likely

• certain

Multiple Choice

Getting a 0 from a bag that contains the number 1 to 9

• impossible

• unlikely

• likely

• certain

Multiple Choice

Sample space describes all the possible ___________ for an event.

• probabilities

• outcomes

• numbers

Multiple Choice

What are ALL the possible outcomes of spinning this spinner?

• { Red, Yellow, Blue}

• {Yellow, Blue, Green}

• {Red, Yellow, Blue, Purple}

• {Red, Yellow, Blue, Green}

Multiple Choice

The Sample Space for rolling a Die is...

• Sample Space: { 1, 2, 3, 4}

• Sample Space: { 1, 2, 3, 4, 5}

• Sample Space: { 1, 2, 3, 4, 5, 6}

• Sample Space: { 1, 2, 3, 4, 5, 6, 7}

Vocabulary

Probability: the likelihood of something happening. It is expressed as a number between 0 (will never happen) and 1 (will always happen). It can be expressed as a decimal, fraction, percentage or ratio.

Calculating Probability

Formula:

Multiple Choice

In his Halloween bag, Jack got 3 Twix, 8 Snickers, 5 Lollipops, and 4 Reese’s. Jack pulls candy out of his bag at random. What is the probability of Jack pulling out a Twix or a Snickers on one try?

• $$\frac{11}{20}$$

• $$\frac{24}{20}$$

• $$\frac{11}{40}$$

• $$\frac{24}{400}$$

Multiple Choice

In a standard box of 8 crayons, what is the probability of pulling out the black crayon?

• 8/8

• 1/4

• 1/2

• 1/8

Multiple Choice

Find the probability of rolling greater than a 1 on a single die.

• 6/6
• 5/6
• 4/6
• 1/6

Multiple Choice

Anaiah has a spinner. (Refer to the image)

What is her chance of getting an odd number?

• Certain

• Most Likely

• Even Chance

• Less Likely

• Impossible

Multiple Choice

Which color are you most likely to choose?

• red

• green

• blue

• yellow

Sample Space of compund events

• This is a list of ALL possible outcomes in a probability event.

• We can do this by:

• making lists, tables, and tree diagrams

F.C.P.

• Determine how many ways or outcomes an event has.

• Determine this for each action

• Ex: rolling a pair of dice

• Die 1 has 6 outcomes: {1,2,3,4,5,6}

• Die 2 has 6 outcomes: {1,2,3,4,5,6}

• Multiply the two outcome totals together

• 6 x 6 = 36

Let's determine the sample space of tossing a coin AND rolling a number cube.

• Coin: {Heads or Tails}

• Number Cube: {1,2,3,4,5 or 6}

Multiple Choice

How many possible outcomes or combinations can we get if we toss a coin, and roll a number cube?

• 6 total outcomes

• 8 total outcomes

• 14 total outcomes

• 12 total outcomes

Multiple Choice

What is the total number of outcomes for...

Tossing 3 coins

• 2 x 3 = 6

• 2 x 2 x 2 = 8

• 3 x 3 = 9

Multiple Choice

Linda is trying to pick out an outfit for school. She has 4 tops, 3 pants, and 5 shoes to pick from. How many total possible outfit combinations does she have?

• 3

• 5

• 12

• 60

How do we find (solve) probability of compound events

P = (1st event) *(2nd event)

Multiple Choice

How do we find compound event?

• dividing simple events

• adding simple events

• multiplying simple events

• subtracting simple events

Find the probability of spinning the spinner and landing on yellow, then tossing the die and landing on 6.

1/3 *1/6=

Multiple Choice

What is the probability of landing on 3 on the die and flipping the coin and landing on heads?

• 1/6

• 1/2

• 1/12

• 3/12

Multiple Choice

A store sells shirts that are either small, medium, or large. The colors are either red, blue, green, or white. What is the probability someone will select a large green shirt, P(large and green)?

• 1/12

• 1/3

• 1/9

• 1/10