PROBABILITY

Theoretical Probability

100

You spin a spinner numbered 1 though 10. Find P(9).

1/10

200

You roll a die. Find the P(5)

1/6

300

You roll a die. Find the P(even). Simplify.

1/2

400

You flip 4 coins. Find the P(all tails).

1/16

500

You spin a spinner numbered 1 through 20. Find the P(25).

0

Includes Predicting and Decision Making

100

The following are the results of tossing a coin 4 times. What is the experimental probability for all tails?

1/16

200

You survey 15 classmates about their favorite pet. 6 said dog, 4 said cat, 3 said fish and 2 said snake. What is the experimental probability for snake in percent form? Round to whole percent.

13%

300

You observe the color of shirts worn by your classmates: 11 have on white, 5 have on blue, 4 have on yellow. What is the experimental probability for blue. Write you answer as a fraction, decimal and percent.

1/4, .25, 25%

400

A quality control inspector found flaws in 13 out of 150 sweatshirts on Tuesday. Suppose on Wednesday he inspects 500 sweatshirts. How many will have flaws?

43

500

The probability of a person being left-handed is about 11%. Suppose you interview 1000 people. About how many would you expect to be left-handed?

About 110

Sample Space/Counting Principle

100

A pizza company makes pizza in three different sizes: small, medium and large. There are four possible toppings: pepperoni, sausage, mushroom and hamburger. How many different kinds of pizza with one toppings are available?

12

200

A coin is tossed twice. How many possible outcomes are there?

4 outcomes

300

Grace has 4 sweaters (white, black, blue and green) and four pairs of pants ( white, black, jeans and khakis). How many different sweater/pant outfits does Grace have?

16

400

Mileon has 4 jackets (white, black, yellow and green) and four pairs of pants ( black, white, jeans and khakis). What is the probability that his jacket and pants will NOT be the same color?

7/8

500

Christian has four pairs of shoes (white, black, brown and green) and four pairs of socks ( white, black, orange and yellow). What is the probability of his shoes and socks being different colors?

1/8

Compound events

100

You roll a fair number cube. Find the P(2, then 5)

1/36

200

You toss a quarter then spin a fair spinner numbered 1-10. Find the P( heads, then even).

1/4

300

Each letter in the word MISSISSIPPI is written on a card. The cards are placed in a basket. Find the P( S, then S if the card is NOT replaced after the first draw).

6/55

400

Each letter in the word MISSISSIPPI is written on a card. The cards are placed in a basket. Find the P(I, then M if the card is replaced before the second draw)

2/55

500

Four cats and six dogs are available for adoption at the humane society. Devin plans to adopt 2 pets. Find the probability her adopting 2 dogs.

1/3

Hmmmm!!

100

What is the complement of 2/9?

7/9

200

You select a letter randomly from a bag containing the letters S,P,I,N,N,E,R. Find the probability of selecting an S in percent form to the tenths place. .

14.3%

300

A bag contains 4 red marbles, 6 blue marbles and 10 yellow marbles. Find the P(not blue) as a fraction, decimal and percent.

7/10, 70%, .70

400

Four cats and six dogs are available for adoption at the humane society. Madison plans to adopt 2 pets. Find the probability her adopting 1 cat and 1 dog in fraction form.

4/15

500

Four cats and six dogs are available for adoption at the humane society. Ms. Herberg plans to adopt 3 pets. Find the probability her adopting 2 dogs and 1 cat in fraction form.

1/6