Physics307L F09:Schedule/Week 10 agenda/Binomial

Binomial Distribution

 * $$f(k;n,p)={n\choose k}p^k(1-p)^{n-k}$$ (This is a probability mass function)

Say you are calculating the probability of having k girls in a family with n children. p is the probability of a single birth resulting in a girl. f tells you the probability of k girls.

 * $${n\choose k}=\frac{n!}{k!(n-k)!}$$