Chapter 5 - Discrete Probability Distributions - 5-3 The Binomial Distribution - Exercises 5-3 - Page 283: 7

a. $0.832$ b. $0.441$ c. $0.336$

$p=1/5=0.2, n=8$ a. The probability that at least one began online $P(X\geq1)=1-P(X=0)=1-0.168=0.832$ b. The probability that two or three began online $P(X=2)+P(X=3)=0.294+0.147=0.441$ c. What is the probability that exactly one began online? $P(X=1)=0.336$