Question

A study conducted at a certain college shows that 62% of the school's graduates find a job in their chosen field within a year after graduation. find the probability that among 5 randomly selected graduates, at least one finds a job in his or her chosen field within a year of graduating.

Answer 1

This can be done easily if you choose a different probability. 
Find the chance that none of the 5 graduates find a job. 
For one student that is 100%-62%=38%
This has to happen for all 5 students, that is P=(0,38)^5=0,008 (rounded) 

This is the chance that none of the 5 students finds a job. All of the above cases at least one finds a job. 

That is 1-0,008=0,992 (rounded)