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tilsendt
08.07.2019 •
Mathematics
Urgent math multiple choice question. will mark ! find the probability that a student rides the bus given that they are a 10th grader.(look at the attached photo)answer choices: a) 150/1025 = 6/41 = .146b) 150/425 = 6/17 = .353c) 150/260 = 15/26 = .577d) 260/425 = 52/85 = .612
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Ответ:
Total number of 10 grader students = 260 students.
Total number of students who rides the bus and they are of 10th grader = 150 students.
Probability (a student rides the bus given that they are a 10th grader) =![\frac{Total \ number \ of \ students \ rides \ the \ bus \ and \ 10th \ grader}{Total \ number \ of \ 10 \ grader \ students}](/tpl/images/0064/6182/4a76e.png)
Therefore,
P(E) =![\frac{150}{260}](/tpl/images/0064/6182/3be71.png)
Dividing top and bottom by 10, we get
P(E) = 15/26.
In decimals 0.577.
Therrefore, correct option is C) 150/260 = 15/26 = .577.
Ответ: