Question 406541
I will assume that the jobs are all different.  Then the total number of ways that none or any of them gets a jobs is 
{{{3C0*5P0 + 3C1*5P1 + 3C2*5P2 + 3C3*5P3 = 136}}}

Therefore, the probability of one person getting a job is 

{{{(2C0*5P1 + 2C1*5P2 + 2C2*5P3)/(3C0*5P0 + 3C1*5P1 + 3C2*5P2 + 3C3*5P3) = 105/136}}}