Nếu hai biến cố A và B độc lập và \(P\left( A \right) = 0,7,P\left( {AB} \right) = 0,28\) thì?
\(P\left( B \right) = 0,42\)
\(P\left( B \right) = 0,4\)
\(P\left( B \right) = 0,98\)
\(P\left( B \right) = 0,196\)
Hãy suy nghĩ và trả lời câu hỏi trước khi xem đáp án
Vì hai biến cố A và B độc lập nên \(P\left( {A \cap B} \right) = P\left( A \right).P\left( B \right) \Rightarrow P\left( B \right) = \frac{{P\left( {A \cap B} \right)}}{{P\left( A \right)}} = \frac{{0,28}}{{0,7}} = 0,4\)
Đáp án B.
Bộ Đề Kiểm Tra Giữa Học Kì II - Toán 11 - (Năm học 2023 - 2024) - Các Trường THPT Trên Toàn Quốc là tài liệu học tập giúp học sinh ôn tập và củng cố kiến thức đã học thông qua các câu hỏi trắc nghiệm đa dạng. Tài liệu không chỉ giúp học sinh rèn luyện kỹ năng tư duy, phân tích mà còn hỗ trợ việc ghi nhớ thông tin quan trọng một cách hiệu quả.
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Gió phơn là
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Read the following passage about the urban shift and mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40. (2,5 points)
[I] Water is one of the most essential resources on our planet, vital for all forms of life. However, increasing demand and pollution are putting immense pressure on our freshwater supplies. [II] According to recent studies, nearly 2 billion people worldwide live in countries experiencing high water stress, leading to a decline in the availability of this precious resource. This situation not only affects drinking water but also agriculture, sanitation, and energy production.
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Despite these efforts, the challenges remain substantial. It is crucial that we recognize the importance of conserving water and take immediate steps to protect this vital resource for future generations.
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CHỦ ĐỀ: TẠI SAO CON NGƯỜI KHÔNG BỊ KHÍ QUYỂN ĐÈ ÉP?
(Tham khảo bài văn của chủ đề trong đường link dưới đây ở trang 21)
https://tvsthpt.dlib.vn/app/doc-sach-ebook/d0afa01ca011
Và trả lời câu hỏi sau:
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"Trong cơ thể con người, các chất (...a...), chất lỏng và chất khí thuộc các bộ phận cũng có áp suất (...b...) với áp suất (...c...) của khí quyển."
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Nhà nước Trung Hoa thời kì cổ - trung đại được tổ chức theo thể chế nào?