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The frequency of tuning forks A and B ar...

The frequency of tuning forks A and B are respectively 5% more and 4% less than the frequency of tuning fork C. When A and B are simultaneously excited, 9 beats per second are produced. Then the frequency of the tuning fork A (in Hz) is

A

103 Hz

B

105 Hz

C

96 Hz

D

100 Hz

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