其它
\textbf{Recently you learned that the probability of getting a critical hit on an attack in your favorite game is 15\%. You've noticed that you do 20 attacks per fight. You're interested in figuring out how likely it is that you would get 5 critical hits during a fight. Which of the following distributions should you use to answer this question?} 
Overseas Competition->Knowledge Point->Calculation Modules
\textbf{Binomial distribution: how likely it is to get x successes in n trials given that your probability of success is p}  \textbf{Geometric distribution: how likely is it that I'll have my first critical strike on the 5th attack}  \textbf{Cumulative geometric distribution: how likely is it that I'll have my first critical strike on or before the 5th attack.} 