Nine qualified applicants apply for a part-time job. if the manager randomly hires 3 of them, what is the probability that he hires the 3 oldest?

There are 3!  = 6 ways he can pick the 3 oldest people
Total number of permutations  of any 3 from 9 = 9P3 =  9*8*7 = 504

so required probability = 6 / 504 = 1/84

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.