SOLUTION: During Spring break on the aleutian islands, the chance of snow on any given day is 45% A) what is the probability that it will snow at most 2 out of 7 days - long spring break?

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Question 455297: During Spring break on the aleutian islands, the chance of snow on any given day is 45%
A) what is the probability that it will snow at most 2 out of 7 days - long spring break?
B) what is the probability that it will not snow at all during spring break?
I do not know the steps for trying to solve this problem. Please help
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
During Spring break on the aleutian islands, the chance of snow on any given day is 45%
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Each day it either snows or it doesn't.
That is a binomial Problem.
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A) what is the probability that it will snow at most 2 out of 7 days - long spring break?
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n = 7 and p = 0.45
Using a TI-84 calculator I get:
P(0<= x <=2) = binomcdf(7,0.45,2) = 0.3164
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B) what is the probability that it will not snow at all during spring break?
P(not snow) = 0.55
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P(not snow for 7 days) = 0.55^7 = 0.01522
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Cheers,
Stan H.
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