Question

KPLC installs new electricity post in Kibera estate and finds that 15% of the new post need a return visit to check for possibilities of vandalism Five post were erected last week Assuming independence of outcomes of these vandalism What is the probability that a return visit was need for all the posts

Answer 1

$$(1-0.15)^5=0.4437$$

$$1-0.4437=0.5563$$