If we sample from a small finite population without replacement, the binomial distribution should not be used because the events are not independent. If sampling is done without replacement and the outcomes belong to one of two types, we can use the hypergeometric distribution. If a population has A objects of one type, while the remaining B objects are of the other type, and if n objects are sampled without replacement, then the probability of getting x objects of type A and n-x objects of type B under the hypergeometric distribution is given by the following formula. In a lottery game, a bettor selects four numbers from 1 to 56 (without repetition), and a winning four-number combination is later randomly selected. Find the probabilities of getting exactly two winning numbers with one ticket. (Hint: Use A = 4, B=52, n = 4, and x = 2.) A! B! (A+B)! P(x)= (A-x)!x! (B-n+x)(n-x)! (A+B-n)!n! P(2)= (Round to four decimal places as needed.)
If we sample from a small finite population without replacement, the binomial distribution should not be used because the events are not independent. If sampling is done without replacement and the outcomes belong to one of two types, we can use the hypergeometric distribution. If a population has A objects of one type, while the remaining B objects are of the other type, and if n objects are sampled without replacement, then the probability of getting x objects of type A and n-x objects of type B under the hypergeometric distribution is given by the following formula. In a lottery game, a bettor selects four numbers from 1 to 56 (without repetition), and a winning four-number combination is later randomly selected. Find the probabilities of getting exactly two winning numbers with one ticket. (Hint: Use A = 4, B=52, n = 4, and x = 2.) A! B! (A+B)! P(x)= (A-x)!x! (B-n+x)(n-x)! (A+B-n)!n! P(2)= (Round to four decimal places as needed.)
Chapter9: Sequences, Probability And Counting Theory
Section9.7: Probability
Problem 5SE: The union of two sets is defined as a set of elements that are present in at least one of the sets....
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Transcribed Image Text:If we sample from a small finite population without replacement, the binomial distribution should not be used because the events are not independent. If sampling is done without replacement and the outcomes belong to one of two types, we can
use the hypergeometric distribution. If a population has A objects of one type, while the remaining B objects are of the other type, and if n objects are sampled without replacement, then the probability of getting x objects of type A and n-x objects
of type B under the hypergeometric distribution is given by the following formula. In a lottery game, a bettor selects four numbers from 1 to 56 (without repetition), and a winning four-number combination is later randomly selected. Find the
probabilities of getting exactly two winning numbers with one ticket. (Hint: Use A = 4, B = 52, n = 4, and x = 2.)
B!
(A + B)!
P(x)=
A!
(A-x)!x! (B-n+x)!(n − x)!
●
+
(A + B - n)!n!
P(2)=
(Round to four decimal places as needed.)
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