Question

Assume that when adults with smartphones are randomly​ selected, 41​% use them in meetings or classes. If 6 adult smartphone users are randomly​ selected, find the probability that at least 2 of them use their smartphones in meetings or classes.

Answer 1

x= smartphone users  in meetings or classes.

X~Binomial(n=6,p=0.41)

#the probability that at least 2 of them use their smartphones in meetings or classes.

ie

P(X<2)=P(x=0)+P(x=1)

P(X<2)=0.04218+0.175871

P(X<2)=0.2181

#the probability that at least 2 of them use their smartphones in meetings or classes is 0.7819