it's a question why should i change it nothing wrong with it ! Every evening a local superhero goes to fight crime. The superhero will beat one...

Suppose that after extensive research you conclude

that the probability that the superhero will get bored after defeating any single criminal is 10%

independently of any others.

i. Find the expected value and standard deviation of the number of criminals that the superhero

will defeat in one night?

ii. The Superhero Union has a requirement for its members that they have to defeat at least

3500 villains in a year. Estimate the probability that our superhero will stay a member this

year.