Q71. If a:b = 3:4 and b:c = 6:7, then the ratio (a+b+c) : c equals:Mathematics — Ratio And Proportion — Question 71 of 75A. 21:37B. 7:3C. 10:7D. 37:21Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →