1) To start her old lawn mower, Rita has to pull a cord and hope for some luck. On any particular pull, the mower has a 20% chance of starting. a) Find the probability that it takes her exactly 3 pulls to start the mower. b) Find the probability that it takes her 10 or fewer pulls to start the mower.

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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1) To start her old lawn mower, Rita has to pull a cord and hope for some luck. On any particular pull, the
mower has a 20% chance of starting.
a) Find the probability that it takes her exactly 3 pulls to start the mower.
b) Find the probability that it takes her 10 or fewer pulls to start the mower.

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