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If the AM and HM of two numbers are 27 and 12 respectively, then what is their GM equal to?

Options

  1. A12
  2. B18
  3. C24
  4. D27

Correct answer

A. 12

Step-by-step solution

Let the two numbers be a and b . So, a+b 2 =27 , and aligned & 1 a + 1 b 2 =12 b+a 2 a b =12 & a b= 27 12 = 9 4 & G.M. = a b = 3 2 aligned

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