stephy2021
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I really need help with this one! please help me!
Assume that when adults with smartphones are randomly​ selected, 56​% use them in meetings or classes. If 5 adult smartphone users are randomly​ selected, find the probability that at least 2 of them use their smartphones in meetings or classes.

Respuesta :

discipulus

Answer:

[tex]p = 56\% = 0.56 \\ n = 5 \\ q = 1 - p = 0.44 \\ P(X = x) =  {n \choose x}  {p}^{x} {q}^{(n - x) } \\ P(X < 2) = P(X = 0) + P(X = 1) \\  {5 \choose 0}  {0.56}^{0} {0.44}^{(5 - 0) } +  {5 \choose 1}  {0.56}^{1} {0.44}^{(5 - 1) } [/tex]

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