The signal power and noise power are denoted by S and N respectively. If the signal power increase to 3S and the noise power reduces by half. The ratio of the old SNR to the new SNR is given by ______.

The signal power and noise power are denoted by S and N respectively.

1.	The signal power and noise power are denoted by S and N respectively. If the signal power increase to 3S and the noise power reduces by half. The ratio of the old SNR to the new SNR is given by ______.
A.	6
B.	2/3
C.	1.5
D.	1/6
Answer» E.