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?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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. The number of A's on the last quiz was 7 out of 20. If I randomly choose a quiz pape...
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?
Transcribed Image Text:. The number of A's on the last quiz was 7 out of 20. If I randomly choose a quiz pape... 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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