Question 888622: It is known that 10% of the customers in an electronics store purchase an MP3 player. A random sample of 30 customers is selected. Assume that the customers’ purchases are made independently. What is the probability of “success” in a single trial of this binomial distribution application?
a.10%
b.30%
c.50%
d.70%
e.90%
Answer by Okamiden(22)   (Show Source):
You can put this solution on YOUR website! This is sort of a trick question to test if you understand what a binomial is. But, in actuality, it just tests if you understand trick questions. :)
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The questions asks for the probability of success in exactly ONE single trial. That's always simply 10%; If you take one single customer in these 30 customers, that represents one single "trial". That "trial" has a 10% chance of "success", which is purchasing an MP3 player.
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Answer: a)
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