Probability Review

Probability is ...

• the chance that some event will occur.
• a game that involves coins.
• a guarantee.

The chart below represents the number of marbles in a jar.
P(green) = 

• 5/19
• 10/28
• 5/14

A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?

• 3/10
• 3/9
• 1/9
• 1/3

An unlikely chance event is closer to what number?

• 0
• 1
• 2
• 3

A die is rolled once.  What is the probability of rolling a 5? Your answer should be a fraction in simplest form.

• 1/6
• 1/3
• 2/5
• 5/6

A die is rolled once.  What is the probability of rolling an odd number? Your answer should be a fraction in simplest form.

• 1/6
• 1/2
• 3/6
• 2/5

A die is rolled once.  What is the probability of rolling a number less than 1? Your answer should be a fraction in simplest form.

• 1/6
• 0
• 5/6
• 1/3

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?

• 5/6
• 1/2
• 1/3
• 1/6

Choose the correct answer to fill in the blank below:      
Sam  flips a coin  4 times.    

He is  ________________ ________________ to flip heads on his next turn  as he is to flip tails.  
   

• equally likely 
• most likely
• least likely

What is the probability of spinning green?

• 0
• 1/4
• 1/2
• 3/4