Find the mean proportional between 6 and 150.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 30.
The mean proportional between two numbers (a) and (b) is given by the square root of their product.
So, for 6 and 150:
Mean proportional = √(6 × 150) = √900 = 30