Harper MTH085 Week 5 Worksheet Intro to Probability

MTH085                                                                            Probability Practice           Name ___________________________

 

1.   The number of Skittles of each color that were found in a case with 1585 Skittles is given in the table below:

 

		Color		Frequency
		Red		285
		Orange		342
		Yellow		333
		Green		271
		Purple		354
Fill in the following:
Individual: ____________________________________________
Variable: _____________________________________________
Type of Variable:	Qualitative		Quantitative-Discrete			Quantitative-Continuous

 

1. Find the probability that a randomly selected Skittle will be yellow. Include a fraction answer and a decimal answer rounded to 3 decimal places.

 

P(                                           ) = ______________________ = __________________

 

Interpret the above probability in 2 ways:

 

1. 1. _____________________________________________________________________

 

1. 1. _____________________________________________________________________

 

1. Find the probability that a randomly selected Skittle will not be purple. Include a fraction answer and a decimal answer rounded to 3 decimal places.

 

P(                                           ) = ______________________ = __________________

 

Interpret the above probability in 2 ways:

 

1. 1. _____________________________________________________________________

 

1. 1. _____________________________________________________________________

 

1. Find the probability that a randomly selected Skittle will be red or green. Include a fraction answer and a decimal answer rounded to 3 decimal places.

 

P(                                           ) = ______________________ = __________________

 

Interpret the above probability in 2 ways:

 

1. 1. _____________________________________________________________________

 

1. 1. _____________________________________________________________________

 

1. Find the probability that a randomly selected Skittle will be be blue. Include a fraction answer and a decimal answer rounded to 3 decimal places.

 

P(                                           ) = ______________________ = __________________

 

Interpret the above probability in 2 ways:

 

1. _____________________________________________________________________

 

1. _____________________________________________________________________

 

MTH085

 

 

Probability Practice

 

 

Name ___________________________

 

 

2. A fair coin is flipped 4 times.

 

 

a. Create an outcome tree for the sample space. Then list all outcomes for the sample space.

 

 

 

The number of equally likely outcomes in this experiment is ___________.

 

b. Find the probability of getting exactly 3 tails.

 

P( ) = ______________________ = __________________ c. Find the probability of getting at least 1 heads.

 

P( ) = ______________________ = __________________ d. Find the probability of getting an even number of tails.

 

P( ) = ______________________ = __________________ e. Find the probability of getting all heads or all tails.

 

P( ) = ______________________ = __________________ f. Find the probability of getting exactly 2 heads and exactly 2 tails.

 

P( ) = ______________________ = __________________ g. Find the probability of getting exactly 2 heads or exactly 2 tails.

 

P(                                           ) = ______________________ = __________________

 

h. Are the events “getting exactly 2 heads” and “getting exactly 2 tails” mutually exclusive?  Please explain.