Say, there are five possible grades, A, B, C, D and F for grading discrete mathematics

N =  X/2  [N will be integer]

Here, X = 1

 

i)  If at least (5+N) students receive the same grade, find the minimum number of students in the discrete mathematics class.

ii)  Find the number of one-to-one functions is there from a set with 5 elements to one with N elements.