Problem#4: It is conjectured that an impurity exists in 30% of all drinking wells in insight into the some testing is necessary. a certain rural community. In order to gain some is determined that extent of the problem, it is too expensive so 10 are randomly selected for testing. (a) Using true It to test all of the wells in the area, the binomial distribution, what is the probability that exactly 3 wells have the impurity, assuming that the conjecture is correct? What is the probability that more than 3 wells are impure? (b)
Problem#4: It is conjectured that an impurity exists in 30% of all drinking wells in insight into the some testing is necessary. a certain rural community. In order to gain some is determined that extent of the problem, it is too expensive so 10 are randomly selected for testing. (a) Using true It to test all of the wells in the area, the binomial distribution, what is the probability that exactly 3 wells have the impurity, assuming that the conjecture is correct? What is the probability that more than 3 wells are impure? (b)
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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Transcribed Image Text:an impurity exists in 30% of all
In order to gain some
is determined that
Problem#4:
It is conjectured that
drinking wells in a certain rural community.
insight into the
some testing is necessary.
true
extent of the problem, it
is too expensive
so 10 are randomly selected for testing. (a) Using
It
to
test all of the
wells in the area,
the binomial
distribution,
what
is
the probability that exactly 3
wells have the impurity, assuming that the conjecture is correct?
(b)
What is the probability that more than 3 wells are impure?
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