Assume that when adults with smartphones are randomly selected, 53% use them in meetings or classes. If 25 adult smartphone users are randomly selected, find the probability that exactly 16 of them use their smartphones in meetings or classes.
The probability is ______ (Round to four decimal places as needed.)
Solution
Given that ,
Using binomial probability formula ,
P(X = x) = (n C x) * px * (1 - p)n - x
P(X = 16) = (25 C 16) * 0.5316 * (0.47)9
= 0.0886
Probability = .0886
SOLUTION :
p = adults with smartphones = 53% = 0.53
q = adults without smartphones = 1 - 0.53 = 0.47
As per binomial distribution : For n = 25 :
P(x = 16)
= ncr(25, 16)*(0.53)^16 *(0.47)^9
= 0.0886 (ANSWER).
Assume that when adults with smartphones are randomly selected, 53% use them in meetings or classes....
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