যদি A: B = 3: 4 এবং B: C = 6: 5 হয় তবে A: (A + C) কত হবে? A. 9 : 11 B. 9 : 10 C. 9 : 19 D. 6 : 7

Make B equal in both ratios: A : B = 3 : 4 = 9 : 12 and B : C = 6 : 5 = 12 : 10. So A = 9 and C = 10, A + C = 19, and A : (A + C) = 9 : 19.