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1. |
A bag contains 4 green marbles, 3 red marbles and 3 blue marbles. Sharon picks a marble without looking. What is the probability that she will pick a red marble? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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2. |
The Counting Principle uses the operation ______. |
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A. |
subtraction |
B. |
multiplication |
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C. |
addition |
D. |
division |
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Hint |
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3. |
Ms. Jones has 8 different flowers. How many different bouquets of 5 flowers can she make? |
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A. |
56 |
B. |
21 |
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C. |
8 |
D. |
336 |
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Hint |
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4. |
How many ways can a committee of 2 girls and 1 boy be formed from a class of 13 girls and 7 boys? |
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A. |
169 |
B. |
1,092 |
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C. |
546 |
D. |
91 |
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Hint |
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5. |
There are 4 white marbles, 6 red marbles, and 2 blue marbles. Once a marble is selected, it is not replaced. Find the probability of selecting 2 blue marbles. |
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A. |
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B. |
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C. |
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D. |
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Hint |
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6. |
Over the last 10 years, the probability that corn seeds planted by Mr. Johannes produce corn is  . This probability is an example of _________. |
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A. |
a theoretical probability |
B. |
an experimental probability |
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C. |
neither |
D. |
both |
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Hint |
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7. |
Lara is running for student council president of the 8th grade class. She would like to poll how the students will vote on election day. Which sample is best for this situation? |
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A. |
A random sample of 50 8th grade students. |
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B. |
A random sample of 50 7th grade students. |
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C. |
A random sample of 50 female 8th grade students. |
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D. |
A poll of Lara's cross-country teammates. |
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Hint |
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8. |
A card is drawn at random from a standard deck of 52 playing cards. What is the probability of drawing a Jack, Queen, or King? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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9. |
Ten cards numbered 1-10 are placed in a hat. What is the probability of randomly drawing a card with an even number then a card with a number greater than or equal to five if the first card is replaced? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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10. |
A bag contains 5 green marbles, 4 black marbles, and 2 white marbles. The table shows the results of random drawings of marbles with replacement. What is the theoretical and experimental probability of drawing a black marble? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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11. |
The workers in the school cafeteria know that 35 out of 50 students prefer chocolate milk to white milk. If 650 students will be purchasing milk, how many servings of white milk should the cafeteria workers expect to sell? |
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A. |
420 |
B. |
195 |
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C. |
455 |
D. |
180 |
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Hint |
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12. |
Morgan can wear a black or a navy skirt with a white, a pink, or a yellow blouse. Which tree diagram represents the situation? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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13. |
Consider all of the five-digit numbers that can be formed using the digits 1, 2, 3, 4, and 5 where no digit is used twice. Find the probability that one of these numbers picked at random is between 10,000 and 20,000. |
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A. |
20% |
B. |
16 % |
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C. |
33% |
D. |
25% |
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Hint |
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14. |
Consider all of the five-digit numbers that can be formed using the digits 1, 2, 3, 4, and 5 where no digit is used twice. Find the probability that one of these numbers picked at random is an even number. |
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A. |
80% |
B. |
20% |
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C. |
60% |
D. |
40% |
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Hint |
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