what is the probability she passes exactly one course?

The probablity she passes the first course is 0,7. The probablity she passes the second course is 0. 8. The probablity she passes at least one of the courses is 0.9.

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What is the probability of “at least one student prefers math”?

Feb 05, 2018 · A college student is taking two courses. The probability she passes the first course is 0.8. The probability she passes the second course is 0.72. The probability she passes at least one of the courses is 0.95. Give your answer to four decimal places.

How to find the probability of at least one success?

The probability she passes the first course is 0.71. The probability she passes the second course is 0.8. The probability she passes at least one of the courses is 0.97.

What is the probability that he answers at least one incorrectly?

Answered 3 years ago · Author has 3.3K answers and 2.9M answer views. The probability of passing at least one class is 1 minus the probability of failing both. Probability of faling both is (1 - .60) (1 - .45) = (.40) (.55) = .22. Probability of passing at least one is 1 - .22 = .78.

What is an example of probability?

Jan 05, 2021 · Lastly, the probability that at least one student prefers math is calculated as: P(at least one prefers math) = 1 – P(all do not prefer math) = 1 – .8847 = .1153. It turns out that we can use the following general formula to find the probability of at least one success in a series of trials: P(at least one success) = 1 - P(failure in one trial) n

Example 1: Free-Throw Attempts

Mike makes 20% of his free-throw attempts. If he attempts 5 free-throws, find the probability that he makes at least one.

Example 2: Widgets

At a given factory, 2% of all widgets are defective. In a random sample of 10 widgets, find the probability that at least one is defective.

Example 3: Trivia Questions

Bob answers 75% of trivia questions correctly. If we ask him 3 trivia questions, find the probability that he answers at least one incorrectly.