Q195. If r ○ s = rs + r + s, then for what value of s is r ○ s equal to r for all values of r?English — NUST Mock By Dogers 3 — Question 195 of 200A. -1B. 0C. 1D. 1/(r+1)E. rPractice more English MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →