यदि A = \(\frac{1}{7}\) और B = \(\frac{1}{8} \) और A, B और C का औसत \(\frac{1}{13}\) है, तो C का मान है:

1
- \(\frac{31}{728}\)
2
- \(\frac{27}{728}\)
3
- \(\frac{49}{728}\)
4
- \( \frac{A + B + C}{3} \)

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