In the signal flow graph of figure shown below y/x equal

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In the signal flow graph of figure shown below y/x equal to—

1. 3
2. 5/2
3. 2
4. None of these

Correct Option: C

From figure y = 5 × 2 × x – 2 × 2 × y
or
y + 4y = 10x
or
5y = 10x
or
y/x = 2