Question

The total number of functions ‘f’ from the set {1,2,3} into the set {1,2,3,4,5} such that f(i) ≤ f(j), ∀i<j, is equal to 

(A) 35 (B) 30 (C) 50 (D) 60 

Answer 1

Correct option (A)  4y³x - 6e^x + 3y³ = cy

Explanation:

Let ‘1’ is associated with ‘r’ , r ∈[1, 2,3,4,5] then ‘2’ can be associated with r, r+1,..., 5. Let ‘2’ is associated with ‘j’ then 3 can be associated with j, j+1,..., 5. Thus, required number of functions