Find the natural number obtained when the number 13 is subtracted from the mean proportional of 75 and 12.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 17.
The mean proportional of two numbers a and b is the square root of their product. So, the mean proportional of 75 and 12 is:
⇒ √(75 × 12) = √900 = 30
Now, subtract 13 from 30:
⇒ 30 - 13 = 17
Therefore, the natural number obtained when 13 is subtracted from the mean proportional of 75 and 12 is 17.