Solution
Given = a : b = 3 : 4; b : c = 4 : 7
=> $$a:b:c=3:4:7$$
Let $$a=3,b=4,c=7$$
$$\therefore$$ $$\frac{a+b+c}{c}$$
= $$\frac{3+4+7}{7}=\frac{14}{7}=2$$
=> Ans - (B)
