SOLUTION: Topic : Discrete Random Variable (Geometric Distribution) In a particular country, 18% of adults wear contact lenses. Adults are randomly selected and interviewed once at a time.

Question 1203339: Topic : Discrete Random Variable (Geometric Distribution)
In a particular country, 18% of adults wear contact lenses. Adults are randomly selected and interviewed once at a time. Find the probability that the first adult who wears contact lenses is:
(a) One of the first 15 interviewed
(b) Not one of the first nine interviewed
Answer by ikleyn(52776) (Show Source): You can put this solution on YOUR website!
.
Topic : Discrete Random Variable (Geometric Distribution)
In a particular country, 18% of adults wear contact lenses.
Adults are randomly selected and interviewed once at a time.
Find the probability that the first adult who wears contact lenses is:
(a) One of the first 15 interviewed
(b) Not one of the first nine interviewed
~~~~~~~~~~~~~~~~~~~

(a) It is a typical binomial distribution probability.
    The number of trials is 15; the number of success is 1 (one);
    the probability of success at each individual trial is 0.18.


    You may use a standard probability formula

       P =  =  = 0.0925  (rounded).    ANSWER



(b) The  ANSWER  is P =  =  = 0.1676  (rounded).

Solved.

RELATED QUESTIONS
Q.1 In the Olympic sport of biathlon, athletes must cross country ski and then shoot a... (answered by Boreal)

According to a research company, during a certain year 82 million out of 182 million... (answered by stanbon)

Topic : Discrete Random Variable (Geometric Distribution) Repeated independent trials... (answered by ikleyn)

Topic : Discrete Random Variable (Geometric Distribution) One in four boxes of Zingo... (answered by ikleyn)

On a particular test, IQ scores for adults follow a bell-shaped (symmetric) distribution... (answered by ewatrrr)

On a particular test, IQ scores for adults follow a bell-shaped distribution with mean=... (answered by stanbon)

a recent survey found that 70% of all adults over 50 wear glasses for driving. In a... (answered by swincher4391)

A recent survey found that 70% of all adults over 50 wear glasses for driving. in a... (answered by ewatrrr)

In a class of 28, 4 out of 16 girls and 7 out of 12 boys wear contact lenses. A student... (answered by edjones)