SOLUTION: I am not sure how to begin to solve this intermediate calculation. According to a recent survey, 25% of college students use a smartphone. You randomly select 15 college studen

Algebra ->  Decimal-numbers -> SOLUTION: I am not sure how to begin to solve this intermediate calculation. According to a recent survey, 25% of college students use a smartphone. You randomly select 15 college studen      Log On


   

Question 1091422: I am not sure how to begin to solve this intermediate calculation.
According to a recent survey, 25% of college students use a smartphone. You randomly select 15 college students and ask if they use a smartphone. The probability that exactly 3 students in your sample use a smartphone is calculated using the following formula;
p=0.25 cubed x 0.75 to the twelfth x 455
to calculate the value of p, you perform a series of calculations, which of the above results should not be rounded. Solve for p. Round to the two decimal places.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
This is a binomial probability computation
nCp(p)^x(1-p)^n-x
Use the problem above
15C3*0.25^3*0.75^12
15C3=455
455*0.25^3*0.75^12=0.2252 or 0.23