Intro to Probability

A set of all possible outcomes is known as ____.

• The sample space

• A list

• An event

• A complement

Probability is….

• The chance that some event will occur

• A game that involves betting

• A guarantee

What does the complement of an event mean?

• A nice event

• The opposite

• The same event

The probability that Pedro will hit a hole in one at the golf course is 40%. If Pedro goes golfing 40 times in a year, how many times can he expect to hit a hole in one?

• 24

• 18

• 16

• 20

The letters from the word GEOMETRY are placed in a bowl. What is the probability of choosing a letter other than “E”?

• 1/8

• 1/3

• 1/4

• 3/4

A bag contains 5 quarters, 2 dimes, and 4 pennies. What is the probability of picking a quarter?

• 5/6

• 3/4

• 5/11

• 4/11

P(green)

• 27.5%

• 15.6%

• 25%

• 33.3%

P(red or yellow)

• 41.7%

• 25%

• 38.5%

• 16.7%

A jar contains 2 pink, 6 red, and 4 blue marbles. If you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

• 2/3

• 5/6

• 3/4

• 1/6

Gabriel has these cans of soup in his kitchen cabinet: 2 cans of tomato soup, 3 cans of chicken noodle soup, 2 cans of italian wedding soup, 2 cans of potato soup, & 1 can of split pea soup. If Gabriel randomly chooses 1 can of soup, what is the probability he selects chicken noodle soup?

• 10%

• 25%

• 30%

• 33%