Assume that when adults with smartphones are randomly selected, 56% use them in meetings or classes....

Assume that when adults with smartphones are randomly selected, 56% use them in meetings or classes. If 10 adult smartphone users are randomly selected, find the probability that at least 4 of them use their smartphones in meetings or classes. The probability is (Round to four decimal places as needed.)

Thank you

Solution:

A binomial with,

n = 10

p = 0.56

P(X 4)

= 1 - BINOM.DIST(3,10,0.56,TRUE)

= 0.9092

Probability = 0.9092

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