How many different ways can you select a pilot and a co pilot if you have 80 people to choose from?
Answers.
A) 199  B) 200  C) 398  D) 4950  E) 6320
1) PERMUTATION:-   since it is selection, we have to find permutation..   80P2= 80!/(80-2)!=6320   ANS:6320
<result>E</result>
How many different ways can you select a pilot and a co pilot if you have 80 people to choose from?