When two networks are connected in series, its composite noise figure

1.	When two networks are connected in series, its composite noise figure can be given as
A.	F1+(F2-1)/G1
B.	F1-(F2-1)/G1
C.	F2+(F1-1)/G1
D.	F1G1+(F2-1)
Answer» B. F1-(F2-1)/G1

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