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Review for Probability Test
Date:
Pre Algebra
1. Priscilla was driving to visit her
cousin and was traveling at a rate of 65
miles per hour. If her cousin lives 390
miles away, how many hours will it take
to complete the trip?
2. A spinner contains 3 equal-sized sections of purple, yellow, and
white. The arrow on this spinner is spun 180 times. Which of the
following best describes the theoretical probability of the arrow
landing on purple for these trials?
A. exactly 30 times
B. close to 30 times
C. exactly 60 times
D. close to 60 times
3. Simplify the expression below.
(7 – 3)3 – (2 – 5) + 5 × 9
4. Jamal will flip a coin and spin the arrow on this spinner. How
many items are in the sample
space of outcomes?
5. Yan’s checking account has $32.95.
He withdraws $50 from the account.
Write an equation that shows the new
balance, in dollars, of Yan’s account?
6. Gaby will flip a coin and spin the arrow on this spinner. What is
the probability of flipping a tails and spinning an odd number?
7. What is the value of the expression 2/5 8. The probability of rain today is 85%. Find the probability of no
y + 6 when y = 15?
rain.
9. Eli had a 14 ½ inch piece of rope. He
cut off 6 ¼ inch of the rope. How long is
the piece that’s left?
10. What is the sample space when a die is rolled?
11. Joe wrote “14 less than 5 times a number is
greater than seventeen” on the board. If x
represents the number, write an inequality that
represents this statement?
12. A lightbulb manufacturer found that out of 300
lightbulbs, 40 were defective. How many lightbulbs
should the manufacturer expect to be defective out
of 3000?
13. If a picket fence is 15 feet long, how many
1/3 foot wide pickets will fit along it?
14. Mia flipped a coin 50 times. The coin landed
tails side up 20 times. If Mia flipped the coin a total
of 400 times, what would be the expected number of
times it would land tails-side up?
15. Nicholas spins the arrow on a spinner with 5
equal sections labeled A,B,C,D, and E. Then, he
rolls a 6-sided number cube with sides numbered
1 through 6. What is the probability that the
arrow will stop on the letter B and the number
cube will show the number 6?
16. Daniel has 6 shirts and 3 pairs of pants. How
many different outfits are possible consisting of one
shirt and one pair of pants?
17. A box contains 7 red pens and 5 blue pens.
Cory randomly picks a pen from the box and
keeps it. Then Ty randomly picks a pen from the
box. What is the probability both boys will pick
red pens?
18. Add: 9
5
2
+5
6
9
1. Given the menu from the ice cream stand, how many possible sundaes are possible with once flavor
and one topping? What is the P(vanilla, sprinkles)? If another topping is added, how many sundaes will
now be possible?
Ice Cream Stand
Flavors
Toppings
Vanilla
Sprinkles
Chocolate Hot fudge
Strawberry
Pistachio
2. A student rolls a die and then flips a coin.
a) Draw a tree diagram of the outcome space
b) List all ordered pairs of outcomes.
c) P(4 on the die, tails on the coin) =
d) P(prime number on the die, heads on the coin) =
e) P(odd number on the die, tails on the coin) =
3. There are 10 pennies, 5 dimes, and 4 quarters in a jar. A coin is picked and kept. Find the
probability of:
P(penny, quarter)
P(2 quarters)
All the coins are put back into the jar. This time the coin is picked and put back after its type is noted.
Find the probability of:
P(2 pennies)
P(dime, quarter)
Which of these are independent events? Dependent events?