ActuaryDad

To determine probability of binomial distribution for success (x=2) use the following ... [n choose x] * p ^x * (1-p) ^ (n-x) where for the first part ... [n choose x] = n! divided by [x! * (n-x!)] so we have 20! / (2! * 18!) = 20 * 19 / 2 = 190 the secon...