To find: The binomial probability model among the given options.
The number of persons with blue eyes in a random sample of 20 persons has a binomial probability model.
Given:
The options are shown below
a. The number of aces in a 5-card hand.
b. The number of persons with blue eyes in a random sample of 20 persons.
c. The total number of spots when two dice are rolled.
d. The number of times you roll a die in order to get a 6.
3. The length of the longest run of heads in 100 tosses of a fair coin.
Concept used:
A probability distribution where each trial has two possible outcomes known as a success and failure, with a fixed number of trials, each trial should be independent and also the probability of each trial is the same, then to calculate the probability of a certain number of successes occurring, a binomial probability distribution is used.
Interpretation:
The number of aces in a 5-card hand may not have the same probability of getting an ace in all cards dealt, thus it is not a binomial probability model.
The total number of spots when two dice are rolled, here the total possible outcomes are more than two, so it cannot be a binomial probability model.
The number of times you roll a die in order to get a 6, the number of trials is not fixed as it can take any number of rolls until a 6 has occurred. So it is not a binomial probability model.
The length of the longest run of heads in 100 tosses of a fair coin, here only the probability of a certain number of successes which occur together has to be calculated, so it is not a binomial probability model.
The number of persons with blue eyes in a random sample of 20 persons, here there are two possible outcomes with a fixed number of persons and the probability that a person with blue eyes is constant for all people. Thus it is a binomial probability model.
Conclusion:
The number of persons with blue eyes in a random sample of 20 persons has a binomial probability model. Option B is correct.
Chapter 10 Solutions
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