Question 317044: Ten percent of adults say oatmeal raisin is their fav cookie. You randomly select 12 adults and ask each to name his or her fav cookie.
1. what is value of N?, p?, q?
c. What is the probability that exactly 3 of the 12 adults surveyed will say their favorite cookie is oatmeal raisin? (You may use the table)
d. What is the probability that 3 or less adults will say oatmeal raisin is their favorite cookie?
(You may use the table)
2. Thirty-eight percent of people in the United States have type O+ blood.
a. If you randomly select five Americans and ask them if their blood type is O+, what is the probability that exactly 3 will have blood type O+?
(You MUST use the binominal formula)
b. If 5 Americans are selected at random, find the probability that 1 or less Americans will have O+ blood type.
(You MUST use the binomial formula)
3. In Pittsburgh, Pennsylvania, about 56% of the days in a year are cloudy.
a. Find the mean (average) number of days during the month of June (June has 30 days) that it will be cloudy in Pittsburgh, PA
b. Find the standard deviation of the number of days in the month of June that it will be cloudy in Pittsburgh, PA.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Ten percent of adults say oatmeal raisin is their fav cookie. You randomly select 12 adults and ask each to name his or her fav cookie.
1. what is value of N?, p?, q?
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N = 12 ; p = 0.10 ; q = 0.90
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c. What is the probability that exactly 3 of the 12 adults surveyed will say their favorite cookie is oatmeal raisin? (You may use the table)
P(x=3) = 10C3*(0.1)^3*(0.9)^7 = 0852
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d. What is the probability that 3 or less adults will say oatmeal raisin is their favorite cookie?
P(0>= x >=3) = binomcdf(12,0.1,3) = 0.9744
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Cheers,
Stan H.
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