Question

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.

Answer 1

`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) )`