Please help with math!!!!!?
1. A bag contains 9 tiles numbered 1 to 9. P(4) = (1 point)
. experimental; the result is found by repeating an experiment.
. experimental; the result is based on the number of possible outcomes.
. theoretical; the result is found by repeating an experiment.
. theoretical; the result is based on the number of possible outcomes.
2. You toss a coin 15 times. P(heads)
• experimental; the result is found by repeating an experiment.
• experimental; the result is based on the number of possible outcomes.
• theoretical; the result is found by repeating an experiment.
• theoretical; the result is based on the number of possible outcomes.
4. A spinner is divided into 10 equal sections numbered from 1 to 10. You spin the spinner once. Find P(not even).
• 1/3
• ½
• 1/5
• ¼
6. Food Express is running a special promotion in which customers can win a free gallon of milk with their food purchase if there is a star on their receipt. So far, 147 of the first 156 customers have not received a star on their receipts. What is the experimental probability of winning a free gallon of milk? (1 point)
• 11/56
• 49/52
• 2/39
• 3/52
7. A bag contains 7 green marbles, 9 red marbles, 10 orange marbles, 5 brown marbles, and 10 blue marbles. You choose a marble, replace it, and choose again. Find P(red, then blue). (1 point)
• 77/164
• 19/41
• 90/1681
• 45/41
8. Two urns each contain green balls and red balls. Urn I contains 10 green balls and 8 red balls, and Urn II contains 3 green balls and 10 red balls. A ball is drawn from each urn. Find P(red and red). (1 point)
• 23/18
• 10/27
• 40/117
• 18/31
11. A basket contains the following pieces of fruit: 3 apples, 2 oranges, 2 bananas, 2 pears, and 5 peaches. Jonas picks a fruit at random and does not replace it. Then Beth picks a fruit at random. What is the probability that Jonas gets a peach and Beth gets an apple? (1 point)
• 15/182
• 8/27
• 4/91
• 15/196
12. The probability of a basketball player hitting a foul shot is 1/3. How many shots would you expect her to make in 90 attempts? (1 point)
• 30
• 60
• 3
• 45
13. A true-false test has 5 questions. What is the probability of guessing the correct answers to all of the questions? (1 point)
• 1/25
• 1/10
• 1/32
• 1/7
here are my answer's please check!
C
D
B
B
A
D
C
B
Does anyone know the answers?
Lesson 7: Probability Unit Test
Can someone please give all the answers for 2019 Lesson 7: Probability Unit Test please .
Let's go through each question and determine the correct answers:
1. A bag contains 9 tiles numbered 1 to 9. P(4) =
This is a theoretical probability, as it is based on the number of possible outcomes. In this case, the total number of outcomes is 9, since there are 9 tiles in the bag. So, the correct answer is "theoretical; the result is based on the number of possible outcomes", which is option C.
2. You toss a coin 15 times. P(heads) =
Since this question involves repeating an experiment, it is an experimental probability. The result is based on the number of possible outcomes, which in this case is 2 (heads or tails). The correct answer is "experimental; the result is based on the number of possible outcomes", which is option B.
4. A spinner is divided into 10 equal sections numbered from 1 to 10. You spin the spinner once. Find P(not even).
To find the probability of an event happening, we need to determine the number of favorable outcomes and divide it by the total number of possible outcomes. In this case, there are 5 odd numbers (not even) out of a total of 10 numbers. So, the correct answer is 5/10, which is equivalent to 1/2. The correct answer is option B.
6. Food Express is running a special promotion in which customers can win a free gallon of milk with their food purchase if there is a star on their receipt. So far, 147 of the first 156 customers have not received a star on their receipts. What is the experimental probability of winning a free gallon of milk?
To find the experimental probability, we need to divide the number of favorable outcomes by the total number of outcomes. In this case, the number of favorable outcomes is 156 - 147 = 9 (customers who received a star). The total number of outcomes is 156 (total customers). So, the correct answer is 9/156, which simplifies to 3/52. The correct answer is option D.
7. A bag contains 7 green marbles, 9 red marbles, 10 orange marbles, 5 brown marbles, and 10 blue marbles. You choose a marble, replace it, and choose again. Find P(red, then blue).
To find the probability of two independent events occurring, we multiply the probabilities of each event. The probability of choosing a red marble is 9/41 since there are 9 red marbles out of a total of 41 marbles. After replacing the first marble, there will still be 41 marbles, so the probability of choosing a blue marble is also 10/41. Therefore, the correct answer is (9/41) * (10/41) = 90/1681. The correct answer is option C.
8. Two urns each contain green balls and red balls. Urn I contains 10 green balls and 8 red balls, and Urn II contains 3 green balls and 10 red balls. A ball is drawn from each urn. Find P(red and red).
To find the probability of two events occurring, we multiply the probabilities of each event. The probability of drawing a red ball from Urn I is 8/18 since there are 8 red balls out of a total of 18 balls. The probability of drawing a red ball from Urn II is 10/13 since there are 10 red balls out of a total of 13 balls. Therefore, the correct answer is (8/18) * (10/13) = 40/117. The correct answer is option C.
11. A basket contains the following pieces of fruit: 3 apples, 2 oranges, 2 bananas, 2 pears, and 5 peaches. Jonas picks a fruit at random and does not replace it. Then Beth picks a fruit at random. What is the probability that Jonas gets a peach and Beth gets an apple?
To find the probability of two dependent events occurring, we multiply the probabilities of each event. The probability of Jonas picking a peach is 5/14 since there are 5 peaches out of a total of 14 fruits. After Jonas picks a peach, there will be 13 fruits left, out of which 3 are apples, so the probability of Beth picking an apple is 3/13. Therefore, the correct answer is (5/14) * (3/13) = 15/182. The correct answer is option A.
12. The probability of a basketball player hitting a foul shot is 1/3. How many shots would you expect her to make in 90 attempts?
To find the expected number of successful outcomes, we multiply the probability by the total number of attempts. In this case, the probability of making a shot is 1/3, and the total number of attempts is 90. Therefore, the expected number of successful shots is (1/3) * 90 = 30. The correct answer is option A.
13. A true-false test has 5 questions. What is the probability of guessing the correct answers to all of the questions?
Since each question has two possible answers (true or false), the probability of guessing the correct answer to each question is 1/2. To find the probability of getting all 5 questions correct, we multiply the probabilities of each question. Therefore, the correct answer is (1/2)^5 = 1/32. The correct answer is option C.
Based on the explanations provided, the correct answers are:
1. C
2. B
4. B
6. A
7. C
8. C
11. A
12. A
13. C