MATH QUIZ: PROBABILITY

In the past month, Alex was late to work twice. If there were 21 days of work last month, what is the experimental probability that he will be late to work tomorrow?

• 2/21

• 2/19

• 19/2

• 2/12

Erin like to make microwave popcorn. Out of the last twenty times she made popcorn, she burned it eleven times. Based on the information, what is the experimental probability that she will NOT burn it next time?

• 11/20

• 20/9

• 9/20

• 20/11

When creating a probability model for rolling a six-sided number cube, the number will __________________

What would be the expected probability of getting this multiple choice question correct?

• 2/4

• 10%

• 1/4

• 1/5

In a basket, there are 4 apples, 6 oranges, and 10 bananas. If you select one fruit at random, what is the probability of each of the following:

• 1/3

• 6/20

• 2/5

• 3/20

How do you understand the concept of probability?

Answer explanation

Probability is the measure of how likely an event is to occur. It is a way to quantify uncertainty and is usually expressed as a number between 0 and 1, or as a fraction or percentage. A probability of 0 means the event is impossible, while a probability of 1 means it’s certain to happen. For example, if you flip a fair coin, there’s a 1 out of 2 chance—or a probability of 1/2—that it will land on heads."