If x : 7.5 = 7 : 17.5, then the value of x is -

A. 1

B. 2.5

C. 3

D. 3.5

Answer: Option C

Solution(By Examveda Team)

$$\eqalign{ & = x:7.5 = 7:17.5 \cr & \Rightarrow 17.5x = 7.5 \times 7 \cr & \Rightarrow x = \frac{{7.5 \times 7}}{{17.5}} \cr & = 3 \cr} $$