two questions
1) a certain irrational number has a decimal expansion in which each digit is randomly chosen from the set (0,1,2,3,4,5,6,7,8,) find the probability that there is no pair of 9s in the first 100 pairs of digits.
2) the random variable s can take values 1,2,3........ and has a geometric distribution. it is given that p(s=2) = 0.2244 find the value of p(s=1) given that it is less than 0.5.
i think it starts p-p2 = 0.2244
thanks