When x is added to each of 2, 3, 30 and 35, then the numbers obtained in this order, are in proportion. What is the mean proportional between (x + 7) and (x – 2)?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 ie 6.
5x + 10 = x + 30 [on comparing]
x = 5
= √36 = 6