Math 7
Unit 14
Review
Name:______________________________________________________Block:_______
Probability Unit Review
1) A bag contains 3 blue, 2 yellow, 1 green, and 4 orange marbles. Write the
probability as a fraction.
a) P(blue)
b) P(green or orange)
c) P(not yellow)
d) P(blue and green) with replacement
e) P(yellow and yellow) without replacement
2) How many outfits can you pick from 4 shirts, 3 hats, and 5 jackets?
3) A code uses the numbers 1, 2, 3, 4, and 5. How many 3 digit codes can be
made if the digits can be repeated?
4) If you can pick one from each list, what is the probability that you chose a
medium, pepperoni, and cheese crust pizza?
Size
Small
Medium
Large
Toppings
Pepperoni
Sausage
Mushrooms
Crust
Thin
Cheese
5) A number cube was rolled 40 times and the results are listed:
Number
1
2
3
4
5
Frequency
6
8
4
6
9
6
7
a) What is the probability that the next roll would be a 2?
b) What is the experimental probability of rolling a 5?
6) What is the probability of rolling an even number on a number cube and
flipping tails on a coin? Write your answer as a percent.
7) A coin is flipped 30 times and the results are shown:
a) What is the theoretical probability that the
next flip will be tails?
Heads
Tails
18
12
b) What is the experimental probability of flipping heads?
8) How many combinations of 1 dinner, 1 dessert, and 1 drink can you make?
Dinner
Dessert
Drink
Soup
Ice Cream
Soda
Fish
Pie
Water
Cake
Hot Chocolate
9) A code uses the letters H, I, J, K, and L. How many codes can you create if
each letter is used once?