Basic Probability Practice

You pull a single marble out of a bag containing 3 blue, 6 red, 7 green, and 4 yellow marbles.  Which of the following is false?

•  $P\left(blue\right)\ =\ \frac{3}{20}$  
  

•  $P\left(red\right)\ =\ \frac{6}{20}$ 

•  $P\left(yellow\right)\ =\ \frac{7}{20}$  
  

•  $P\left(green\right)\ =\ \frac{7}{20}$ outfits 
  

What is the sample space for flipping TWO coins?

• H, T

• HH, TT

• HH, HT, TT

• HH, HT, TH, TT

The collection of all possible outcomes is called the ____________________.

• set

• probability

• event

• sample space

You will roll a six-sided single die.  What is the theoretical probability that you roll an even number?

•  $P\left(even\right)\ =\ \frac{2}{3}$  
  

•  $P\left(even\right)\ =\ \frac{1}{3}$ 

•  $P\left(even\right)\ =\ \frac{1}{2}$  
  

•  $P\left(even\right)\ =\ \frac{3}{4}$ 
  

You rolled the six-sided die 6 times and got these results: 1, 6, 3, 5, 2, 1  What is the experimental probability that you rolled an even number?

•  $P\left(even\right)\ =\ \frac{2}{3}$  
  

•  $P\left(even\right)\ =\ \frac{1}{3}$ 

•  $P\left(even\right)\ =\ \frac{1}{2}$  
  

•  $P\left(even\right)\ =\ \frac{3}{4}$ 
  

What is the P( not purple) on this spinner?

• 2/5

• 1/5

• 4/5

• 3/5

• The probability you select a blue marble.

• The probability you select a marble that is red or blue.

• The probability you select a black marble.

• The probability you do not select a red marble.

One card is drawn from a shuffled deck. What is the probability it is a a Club?

Two dice are rolled. What is the probability the sum of the dice is greater than 9?

Two dice are rolled. What is the probability that neither of the two dice shows a "five"?