A multiple-choice test has 30 questions. There are 4 choices for each question. A student who has not studied for the test decides to answer all questions randomly. What type of probability distribution can be used to figure out his chance of getting at least 20 questions right?
A) Binomial distribution B) Poisson distribution
C) Hypergeometric distribution D) None of the above.
Question 2
On the average, 1.8 customers per minute arrive at any one of the checkout counters of a grocery store. What type of probability distribution can be used to find out the probability that there will be no customer arriving at a checkout counter?
A) Binomial distribution B) Poisson distribution
C) Hypergeometric distribution D) None of the above.
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