IB App Probability Review

What is the probability of spinning red?

• 0

• 1/2

• 3/4

• 1

The letters that form the word MATHEMATICS are placed in a bowl. What is the probability of choosing a letter that is a vowel?

• 8/121

• 4/11

• 2/11

• 4/121

Mrs. Elder has a box containing 6 cracker, 3 peppermints, 6 bubble gums, and 3 licorice sticks. If she randomly chooses one piece from the box, what is the probability that she will grab a cracker or a peppermint?

• peppermint

• 1/6

• 1/2

• 1/3

You flip a nickel three times.
Find the probability that all flips will land on tails.

• 1/2

• 1/4

• 1/6

• 1/8

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?

• 1/3

• 1/7

• 1/9

• 1/12

In a drawer, there are 6 white socks, 4 black socks, and 2 brown socks. You pick out a sock, replace it, then pick out a 2nd sock. What is the probability that you will pick a brown, then black sock?

• 1/11

• 1/18

• 1/36

• 2/33

You roll two die.
What is the probability you will roll a 4, then roll a number less than 3?

• 1/36

• 1/18

• 1/9

• 1/6

P(2 then 5) = 

• 1/6

• 1/12

• 1/36

What is the probability that a student plays on a sports team given they don't play an instrument? 

• .7273

• .8

• .55

• .2222

What is the probability of spinning an even number? 

• 16 2/3%

• 33 1/3%

• 50%

• 75%