What is the output frequency of mod-45 counter if the input frequency is 9 khz and how?

A mod-45 counter divides the input frequency by 45. If the input frequency is 9 kHz, the output frequency can be calculated by dividing 9 kHz by 45. Therefore, the output frequency is 9,000 Hz / 45 = 200 Hz. Thus, the output frequency of the mod-45 counter is 200 Hz.