Name_____________________________
Date____________
Period______
Probability Continued
(make sure you reduce completely)
1. A folder contains the words “RICHLAND HIGH SCHOOL”. You draw one letter at a time and replace it. Find each
probability.
a. P(H or D)____________________
d. P(A or L)_____________________
b. P(N, then an O)____________________
e. P(C, then a G)_______________________
c. P(I, then a R, then an I)_____________________
f.
P(H, then not a vowel)______________________
2. The same folder as above, but this time you do not replace the letter you draw. Find each probability.
a. P(H or D)____________________
c. P(A or L)_____________________
b. P(N, then an O)____________________
d.
P(I, then a R, then an I)_____________________
3. You have a die (number cube). Find each probability.
a. P(1 or 2)_______________________________
e. P(4, then a 5)_________________________
b. P(even or an odd)________________________
f. P(prime number, then a 2)____________________
c. P(even, then an odd)________________________
g. P(4, then 5, then 6)___________________________
d. P(not rolling a 2 or a 3)______________________
h. P(not rolling an even number)___________________
4. You have a fair coin. Find each probability.
a. P(H, then T)_______________________________
c. P(three H in a row)___________________________
b. P(H, then H)_______________________________
d. P(two T, then a H)____________________________
5. In a high school auditorium, 1 junior and 2 sophomores are seated randomly together in a row. What is the
probability that the two sophomores are seated next to each other?
6. Marcos has a spinner with 12 sections, equal in size, colored either blue or red. If the spinner lands on blue 33 out
of 50 spins, what is the most likely number of blue sections on the spinner?
7. Jared has a white cube and a red cube. The surfaces of each cube are numbered with a unique number from 1 to 6.
If Jared tosses the cubes, what is the probability he will get a 4 on the white cube and an odd number on the red
cube?
8. Winners from the math club’s fundraiser randomly select a gift certificate from Box A and from Box B. The
contents of each box are shown below.
Box A
5 dinner certificates
4 DVD certificates
3 Movie certificates
5 T-shirt certificates
Box B
4 CD certificates
3 camera certificates
5 amusement park certificates
5 television certificates
What is the probability that the first winner will randomly select a DVD certificate and an amusement park
certificate?
9. The jar below contains 24 solid-colored marbles of equal size.
If a person were to randomly select one marble from the jar, replace it, and then randomly select again, what is the
probability that the first marble will be blue and the second will be white?
10. The table below shows the results of rolling a fair number cube 50 times during a classroom activity.
Number – Cube Data
Outcome
1
2
3
4
5
6
Frequency
7
12
10
9
8
4
What is the difference between the theoretical probability of rolling a number less than 4 and the
experimental results recorded in the table above?
a) 79%
b) 8%
c) 58%
d) 12%
11. A spinner was spun 20 times. The results are shown below.
Which color on the spinner has the same experimental probability as theoretical probability?
12. At Reyna High School 50% of the students eat lunch in the school cafeteria. In the same school 10% of the
students participate in sports. What is the probability that a student selected at random eats in the school cafeteria
and participate in sports?
13. A jar contains 6 red marbles and 10 blue marbles, all of equal size. If Dominic were to randomly select 1 marble
without replacement and then select another marble from the jar, what would be the probability of selecting 2 red
marbles from the jar?