Let's say that on the Island of Sodor, it rains 15% of the time, and due to the frequent shifts in the wind, no weather today seems to have any impact  on weather tomorrow.  If we go outside for a week, what is the probability that we observe rain   not at all exactly once twice thrice four times five times six times seven times.

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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Let's say that on the Island of Sodor, it rains 15% of the time, and due to the frequent shifts in the wind, no weather today seems to have any impact  on weather tomorrow.  If we go outside for a week, what is the probability that we observe rain
 
not at all
exactly once
twice
thrice
four times
five times
six times
seven times.
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