The number of A's on the last quiz was 7 out of 20. If I randomly choose a quiz paper... a. What is the probability that the first A is on the 3rd one I choose? b. What is the probability that the first A is on the 1st, 2nd or 3rd pick? c. What is the probability that it takes 10 quizzes before I choose an A?

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A: From the provided information, Mean (µ) = 50 Standard deviation (σ) = 25 W~N (50, 25)

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A: a) For any two events A and B, it is known that P(A ∪ B) = P(A)  + P(B) – P(A ∩ B).

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A: The general formula for conditional distribution is,

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A: Thanks for the question :)And your upvote will be really appreciable ;)

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Q: According to the U.S. Census Bureau, the probability that a randomly selected household speaks only…

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Q: In a class of students, the following data table summarizes how many students have a brother or a…

A: Solution

Q: The students at a high school were asked whether they have a pet. The table displayed the result.…

A: The students at a high school were asked whether they have a pet. The table displayed the result.we…

Q: If she rolls a six-sided, fair die to make her decision and selects the company depending on what…

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Q: Assume that Jim, Bruce, and Valerie are three of the 35 members of the​ class, and that three of the…

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Q: A survey of 200 people was conducted to see if they smoke.   The results are shown in the table.…

A: The provided data is,

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Q: Suppose that of the 300 seniors who graduated from Schwarzchild High School last spring, some have…

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Q: If 35% of cows in a herd have Mad Cow disease, and a rancher randomly selects 7 cows, what is the…

A: Given data,Number of cows n=7p=35%=0.35P(X=4)=?

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