The probability of the first senator being from some other state is 98/100=49/50; the probability of none of the senators being from my state is 49/50*97/99*48/49*95/97*47/48=893/990. And 1-893/990=97/990=0.09798 approximately. This is the probabality that at least one senator will be from my state ("at least one" is the converse of "none at all"). That is, 9.80% or 0.10 to two decimal places.