1. Probability Review Name _________________ Date _________________
Period B ____, G _____
Probability Review
Find the probability . Write your answer as a fraction and a percent (Round all percentages to the nearest WHOLE number.) 1.
Fraction:_______
Percent: _______ 2.
Fraction: _______ 3. 4. 5.
1) What is the probability of getting a number less than 4?
2) What is the probability that Jasmine will draw a nickel from her change purse if she has 6 quarters, 7 dimes, 5 nickels, and 2 pennies inside?
3) Joe and Lily each spun a spinner 40 times and recorded the results. What is the experimental probability of Lily landing on yellow?
4) A bag contains 1 red, 6 blue, and 15 purple jolly ranchers. What is the probability that you will get the blue jolly rancher and after eating it get another chance to get the red one you really wanted?
5) What is the probability of rolling a die 3 times and getting the number 5 or fewer each time?

2. 9. Write your answer in the blank. 6.
Fraction:__________
Percent: __________ 7. 8.
Fraction: __________
9. Write your answer in the blank.
6) What is the probability of spinning an odd number both spinners?
7) The table shows how many times a number was rolled on a number cube during an experiment. What is the probability that the next roll will result in a 2?
# rolled
# of times rolled 1 7 2 8 3 9 4 5 6 10
8) What is the theoretical probability that the next roll on a six-sided die will be a 2?
Fill in the blank based upon your answers for #7 and #8. If there is not enough information write “n/a”.
The experimental probability is ________________ the theoretical probability.
(greater than/less than/same as)

3. 10. ____________
11. _____________
12. _____________
_____________
10) Your bike lock has 3 digits numbered 0 to 9. Find the total number of possible combinations for the lock.
11) How many different license plates can be made if it is two numbers, followed by one letter, followed by one number (like the one pictured here)?
12) You have 150 songs on your iPod. The probability of randomly choosing a rock song is 40%. How many of the songs on your iPod are rock songs?
13) The theoretical probability of spinning an odd number on a spinner is If the spinner was spun 540 times, about how many times would you expect an odd number to be spun?

4. 26,000 license plates 15/64 = 23% 4/12 = 33% 60 rock songs 5/20 = 25%
14. ____________
15. Write your sentence in the space under the question.
14) Sarah is trying to estimate how many marshmallow “charms” are in a box of Lucky Charms. In the first bowl of 90 pieces of cereal, there were 15 charms. How many marshmallow charms should she predict are in a box of 1430 total pieces of cereal?
15) Write a complete sentence describing the difference between theoretical and experimental probability.
4/12 = 33%
5/20 = 25%
14/40 = 35%
6/462 = 1%
125/216 = 58%
15/64 = 23%
8/50 = 16%
1/6 = 17%
Less than
1,000 combinations
26,000 license plates
60 rock songs
About 216 times
About 238 charms
Theoretical is what should happen in theory. Experimental is based on data from an experiment or events.