Class 12 Linear Programming · Mcq Single Correct1 Markscorner_point_optimization Class 12 Maths · Linear Programming · Mcq Single Correct #3 Z=ax+by has maximum 42 at (4,6) and minimum 19 at (3,2). Find a,b. (A) 9,1(B) 9,2(C) 3,5(D) 5,3