MSA Prep Grade 8 Probability

- 1. Allison is out to eat with her parents. She has an option of 5 different drinks (soda, coffee, tea, water, juice), 2 main courses (chicken, steak), and 3 sides (rice, green beans, and potatoe). How many different combinations are possible?
A) 10 B) 20 C) 100 D) 30 - 2. There are 5 blue , 3 yellow, and 4 red chips in a bag. You draw two chips out of the bag without replacement. Given the first chip is blue, what is the probability the second chip will be red?
A) 4/11 B) 5/12 C) 9/12 D) 20% - 3. If I roll two number cubes and flip a coin, how many possible outcomes are there?
A) 12 B) 36 C) 14 D) 72 - 4. What is the probability of flipping a coin twice and getting two tails?
A) 1/4 B) 4 C) 1/2 D) 1 - 5. I have a full deck of cards (52 cards). What is the probability of pulling a 10 out of the deck at random? (Reminder: There are 4 of each card in the deck) Express as a decimal, rounded to the nearest hundreths.
A) .25 B) .07 C) .08 D) .02 - 6. James has 5 baseball cards, 3 football cards, and 1 hockey card (all different). He picks 2 cards at random without replacement. How many possible outcomes (card combinations) are there?
A) 15 B) 72 C) 9 D) 81 - 7. There are 23 boys and 22 girls on the track and field team. Last week, Mike was selected as the captain of the week. If he cannot be the captain this week, what is the probability a girl will be the captain of the week? (in decimal form)
A) .5 B) .49 C) .05 D) 1 - 8. Joshua has 6 comedy DVDs, 2 drama DVDs, and 3 music concert DVDs. He watches a comedy DVD, and does not put it back. What is the probability that the next DVD he picks is a music concert? Write your answer as a decimal.
A) .2 B) .08 C) .27 D) .3 - 9. Heather shot 21 free throws and made 15 of them in last nights game. If she shot 235 free throws throughout the season, how many would you predict her to make? (Round to the nearest whole free throw)
A) 15.6 B) 168 C) 229 D) 211 - 10. Igor flipped two coins and rolled one die. What is the theoretical probability he will have two heads and the number 7?
A) 1/4 B) 0 C) 1/24 D) 1/12 - 11. Eric has a bag of marbles. Inside the bag there are 4 blue marbles, 4 red marbles, and 2 green. Eric chooses 2 marbles at random without replacement. If the first marble is green, what is the probability the second marble will also be green?
A) 1/5 B) 14/45 C) 1/9 D) 3/10 - 12. Janice conducted a survey at the local calculator factory. She discovered that 10% of every 80 calculators did not work. Using this survey, what kind of predictions can she make about the next 400 calculators?
A) 5 will not work B) 40 will not work C) 8 will not work D) not enough information - 13. A child has 5 pairs of jeans, 4 pairs of shorts, and 6 cargo pants. If he randomly chooses to wear shorts on Monday and does not replace them, what is the probability he will randomly choose to wear cargo pants on Tuesday?
A) 6/15 B) 6/9 C) 3/4 D) 3/7 - 14. Using the spinner above, what is <br> P(Yellow or Green)?
A) 1/10 B) 2/5 C) 1/5 D) 3/5 - 15. Using the spinner above, what is the <br> P(Yellow or E)?
A) 1/12 B) 1/2 C) 2/3 D) 1/3 - 16. Andrea has 8 blue socks and 4 red socks. She chooses one sock at random and puts it on. She then chooses another sock without looking. If the first sock is red, find the probability that the second sock will also be red.
A) 1/6 B) 2/11 C) 1/12 D) 3/11 |

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