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fnaflover8505
12.02.2020 •
Mathematics
A survey of Amazon.com shoppers reveals the following probability distribution of the number of books purchased per hit.
X 0 1 2 3 4 5 6 7
P(X) .35 .25 .20 .08 .06 .03 .02 .01
a. What is the probability that an Amazon.com visitor will buy four books?
b. What is the probability that an Amazon.com visitor will buy eight books?
c. What is the probability that an Amazon.com visitor will not buy any books?
d. What is the probability that an Amazon.com visitor will buy at least one book?
Solved
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Ответ:
a)![P(X=4) = 0.06](/tpl/images/0508/0810/3bb91.png)
b)![P(X=8) = 0](/tpl/images/0508/0810/94439.png)
c)![P(X=0) = 0.35](/tpl/images/0508/0810/1bc56.png)
d)![P(X\geq 1)= 1-P(X](/tpl/images/0508/0810/76627.png)
Step-by-step explanation:
For this case we define the random variable X as "number of books purchased per hit."
And as we can see the distribution for x is given by:
X 0 1 2 3 4 5 6 7
P(X) .35 .25 .20 .08 .06 .03 .02 .01
Part a
For this case we want this probability:
Part b
For this case we want this probability:
Part c
For this case we want this probability:
Part d
For this case we want this probability:
And we can use the complement rule like this:
Ответ:
the answer is there’s is a rope around his neck.
His hands are tied behind his back
he is standing high above a river
some crimes are punished by hanging
Explanation: