Introduce Probability

A farm has 5 brown cows and 10 white cows. A fence is open and two cows escape. What is the probability that it will be a brown cow, then a white cow?

• 1/9

• 2/9

• 5/21

• 10/21

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

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

• 5/11

• 5/6

• 1/3

• 5

You spin the spinner. How many possible outcomes are there?

• 4

• 8

• 1

• 6

Find the theoretical probability of landing on orange or red if you spin the spinner.

• 0

• 3/8

• 2/8

• 1/4

In a cup are the numbers 1 - 20. Find the theoretical probability of 
picking an even number. 

• 10/20

• 1/2

• 1/20

• 20/20

In a cup are the numbers 1 - 20. Find the theoretical probability of 
picking a number divisible by 5. 

• 4/20

• 1/5

• 5/20

• 1/4

An experiment consists of rolling a fair number cube. Find the theoretical probability of rolling a 3.

• 1/6

• 3/6

• 1

• 1/2

An experiment consists of rolling a fair number cube. Find the theoretical probability of rolling a number greater than 3.

• 4, 5, and 6

• 3/6

• 3

• 1/2