Question 1118481
The number of possible incomes is {{{2^40}}} which is 1,099,511,627,776. There is 41 incomes that does not favor the probability we want to get. So 1,099,511,627,776-41=1,099,511,627,735. Therefore, the probability is {{{1099511627735/1099511627776}}} which is approx. 99.9999999962711%