That is 3 slots
12 in 1st slot
11 in 2nd
10 in 3rd
so that is 12*11*10 or 1320 ways
Answer: 
Step-by-step explanation:
Given
Function is 



from (i) and (ii) we get

If f(x) is the inverse of g(x) then if f(a)=b then g(b)=a
so if G(s) is the inverse of S(g) then if G(2)=16 then S(16)=2, true
yes, it's true
A is answer