Statement 1 gives the value of G of which we are not concerned. Not sufficient.

Statement 2 gives a just relation between G and F. Not sufficient.

Now on combining we merely get to know that frequency of F is 19kHz.

Given fact is: Frequencies greater than or equal to 22 kHz are inaudible to the human ear. BUT it doesn't tells us the exact value beyond which the inaudibility starts.

consider the example: integers less than or equal to -5 are negative. But does really the negative numbers start from -5? No. We need the exact value beyond which the negative range starts to say even something.

The same principle applies here.

Hope that helps.

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Prepositional Phrases Clarified|Elimination of BEING| Absolute Phrases Clarified

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