advice, pls~

[likewhoa]

p,s,n are positive integers & p+s=N
N=?

(1) p-1=0.2(N-1)
(2) s-2=0.75(N-2)

[sujaysolanki]

If we add 1 and 2 and using stem that P + S = n

we can calculate N

Adding 1 and 2 we get

P + s -3 = .2 (n-1) + .75(n-2)

From stem P + s = n

Hence C