There are 26 tuning forks arranged in the decreasing P order of the...

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There are 26 tuning forks arranged in the decreasing
P order of their frequencies. Each tuning fork gives 3

W beats with the next. The first one is octave of the last. What is the frequency of \( 18^{\text {th }} \) tuning fork?
(a) \( 100 \mathrm{~Hz} \) (b) \( 99 \mathrm{~Hz} \)
(c) \( 96 \mathrm{~Hz} \)
(d) \( 103 \mathrm{~Hz} \)
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