Q-) The number of injury claims per month is modelled by a random variable N with: P(N=n)= 1/(n+1)(n+2),where n>=0 Determine the probability of at least 1 claim during a particular month, GIVEN that there have been at most 4 claims during that month
A-) I tried punching in values of n. So I got the conditional probability as = (I/6 +1/12+ 1/20+ 1/30)/(1/3 + 1/6 + 1/12 + 1/20 + 1/30) But this isn't matching with the given answer. I am not sure what's wrong. If at all it is wrong. Thanks in advance.