Multiple choice A signal of power 50 W is mixed with a noise of 2 mW. Calculate the SNR ratio in dB. 4.39 16.97 25,000 43.98 None of the above Reveal answer Fill a bubble to check yourself D Correct answer Explanation SNRdB = 10 log 10 (Average Signal Power / verage Noise Power ) = 10 log 10 (50,000 mW / 2 mW ) = 10 log 10 25,000=43.979 dB.