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Unit 7 Quiz B Study Guide – Probability
7) A spinner like the one shown is used in a game. Determine the probability of the outcome if the spinner is
equally likely to land on each section. Express the probability as a fraction and as a percent.
P (less than 3)
__________
__________
P (even)
__________
__________
8) A card is drawn from a standard deck of 52 cards. Find the probability of the following:
P (an ace OR a 5 of hearts)
9) There are 6 blue marbles, 7 black marbles, 4 orange marbles, and 3 green marbles in a bag. One marble is
chosen from the bag and it is replaced. Then a second marble is chosen. Find the probability of the following.
a) P (a blue and a green marble)
b) P (an orange and blue marble) =
10) Two marbles are randomly selected from a bag that contains 5 green, 4 red, and 6 blue marbles.
After a marble is selected, it is not replaced. Write the probability of each outcome as a percent rounded to
the nearest tenth or a fraction in simplest form.
a) P(a red marble, then a green marble)
b) P(two green marbles in a row)
c) P(a green marble, then a blue marble)