Both correct!
Order is important for the first one, and not on the second.
How many ways can a teacher arrange 10 students in a front row if there are 60 students
I think I do 60!/50! = 2.74 *10^17
How many ways can you choose committee of 7 from a total of 20
(20 nCr7) = 77520
1 answer
3 answers