if i guess at five choice questions. each question has 5 anwsers to pick from. whats the probability that i l get three correct? tell me how u did it also thanks.
if i guess at five choice questions. each question has 5 anwsers to pick from. whats the probability that i l get three correct? tell me how u did it also thanks.
If $\displaystyle p$ is the probability of success and $\displaystyle N$ is the number of trials then the probability of exactly $\displaystyle k$ successes, where $\displaystyle 0\le k\le N$, is $\displaystyle \binom{N}{k}p^k(1-p)^{N-k}$.