## Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

a. $0.0027$ b. $0.636$ c. $0.757$
a. None of the 3 households had cable TV $p=(1-0.86)\times(1-0.86)\times(1-0.86)=0.0027$ b. All 3 households had cable TV $p=(0.86)\times(0.86)\times(0.86)=0.636$ c. At least 1 of the 3 households had cable TV One: $p=(0.86)\times(1-0.86)\times(1-0.86)=0.017$ Two: $p=(0.86)\times(0.86)\times(1-0.86)=0.104$ Three: $p=(0.86)\times(0.86)\times(0.86)=0.636$ Total $p=0.017+0.104+0.636=0.757$