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
At a convention center, there are a total of 375 visitors. Each visitor is located in either room A, room B, or room C. If one of these visitors is selected at random, the probability of selecting a visitor who is located in room A is 0.76, and the probability of selecting a visitor who is located in room B is 0.16. How many visitors are located in room C?
原库参考解析
概率与条件概率挑战
The table gives the distribution of flavor and type of topping for customer orders at an ice cream shop.
If a customer order is selected at random, what is the probability of selecting an order with sprinkles, given the flavor of ice cream is vanilla?
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 a choice of 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? (Express your answer as a decimal or fraction, not as a percent.)
参考答案
概率与条件概率挑战
A research study categorized 100 vehicles as either fuel efficient or fuel inefficient. If a vehicle from the study is selected at random, the probability of selecting a vehicle that was categorized as fuel efficient is \( \frac{64}{100} \). How many of the vehicles in the study were categorized as fuel efficient?
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概率与条件概率挑战
The table shows the distribution of people in a certain city by age group.
If a person in this city is selected at random, which of the following is closest to the probability of selecting a person who is greater than 65 years old, given that the person is at least 18 years old?
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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 a tree from site A, given that the tree is a red maple? (Express your answer as a decimal or fraction, not as a percent.)
参考答案
概率与条件概率挑战
At a conference hall, there are a total of 300 visitors. Each visitor is located in either room A, room B, or room C. If one of these visitors is selected at random, the probability of selecting a visitor who is located in room A is 0.42 and the probability of selecting a visitor who is located in room B is 0.18. How many visitors are located in room C?
参考答案
概率与条件概率进阶
Each rock in a collection of 70 rocks was classified as either igneous, metamorphic, or sedimentary, as shown in the frequency table.
If one of these rocks is selected at random, what is the probability of selecting a rock that is igneous?
If one of these rocks is selected at random, what is the probability of selecting a rock that is igneous?
参考答案
概率与条件概率进阶
The table shows the distribution of the 162 igneous rocks in a certain earth science laboratory by mineral composition and texture. What fraction of the laboratory's granitic rocks are coarse‑grained?
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概率与条件概率进阶
Each face of a fair 12-sided die is labeled with a number from 1 through 12, with a different number appearing on each face. If the die is rolled one time, what is the probability of rolling a 5?
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概率与条件概率进阶
Each face of a fair 20-sided die is labeled with a number from 1 through 20, with a different number appearing on each face. If the die is rolled one time, what is the probability of rolling a 9?
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概率与条件概率进阶
Each face of a fair 16-sided die is labeled with a number from 1 through 16, with a different number appearing on each face. If the die is rolled one time, what is the probability of rolling a 4?
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