5272道题目5525 条题源记录 · 相同内容已合并
概率与条件概率进阶
The table gives the distribution of favorite core subiect and grade level for 80 students.
If a student is selected at random, what is the probability of selecting a student whose favorite core subject is mathematics?
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概率与条件概率进阶
The table summarizes members of a local organization by age and whether they live north or south of Center St. If a member of the organization is selected at random, what is the probability that the selected member is at least 45 years old?
原库参考解析
概率与条件概率进阶
on a particular assembly line,51 out of every 100 products have a defect. A product from the assembly line will be selected at random. what is the probability of selecting a product that has a defect?
原库参考解析
概率与条件概率进阶
The table gives the distribution of favorite core subject and grade level for 80 students.
If a student is selected at random, what is the probability of selecting a student whose favorite core subject is mathematics?
原库参考解析
概率与条件概率进阶
A certain book has 250 pages, and 21 of these pages have an illustration. If one of the book's pages is selected at random, what is the probability of selecting a page with an illustration? (Express your answer as a decimal of fraction, not as a percent.)
原库参考解析
概率与条件概率进阶
A certain book has 250 pages, and 21 of these pages have an illustration. If one of the book's pages is selected at random, what is the probability of selecting a page with an illustration? (Express your answer as a decimal or fraction, not as a percent.)
原库参考解析
概率与条件概率进阶
The table summarizes members of a local organization by age and whether they live north or south of Center St. If a member of the organization is selected at random, what is the probability that the selected member is at least 45 years old?
原库参考解析
概率与条件概率进阶
A total of 50 people attended a conference and were offered 4 types of entrees. The table shows the number of people who chose each type of entree.
If one of these people is selected at random, what is the probability of selecting a person who chose a vegetarian entree?
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概率与条件概率挑战
For an exercise physiology study, 75 participants were assigned to an activity, and their average heart rate while engaged in the activity was recorded. The table summarizes the results of this study.
One of these participants will be selected at random. What is the probability of selecting a participant who was assigned to the swimming activity given that the participant had an average heart rate of less than 130 beats per minute while engaged in an activity? (Express your answer as a decimal or fraction, not as a percent.)
原库参考解析
概率与条件概率挑战
The table shows the distribution of two types of trees at two different sites. If a tree represented in the table is selected at random, what is the probability of selecting tree from site A, given that the tree is a red maple? (Express your answer as a decimal or fraction, not as a percent.)
原库参考解析
概率与条件概率进阶
A bin contains a mixture of T-shirts for two sports teams. The table shows the number of T-shirts in the bin, classified by size and sports team.
One T-shirt from the bin will be selected at random. What is the probability of selecting a T-shirt that is medium, given that the T-shirt is a Flames T-shirt? (Express your answer as a decimal or fraction, not as a percent.)
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概率与条件概率进阶
Each of 181 flowers can be classified as one of three colors, as shown in the frequency table.
If one of the flowers is selected at random, what is the probability of selecting a flower of color Y?
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