The answer is 25.
2 seconds sound clip from The Honeymooners (1955) - The $99000 Answer sitcom.
You can hear this line at 00:02:08.114 in the Blu-ray version of the episode.
Quote context
[...]
- Your question has to do with something you see and handle every day: a dollar bill.
- You have ten seconds to give the $49500 answer.
- Time's up, Mr. Parker. What is your answer?
- That's correct for the first part.
- Now, tell me how many times the word 'one' appears, and how many times the numeral '1' appears.
- Well, the word 'one' appears 16 times, and the numeral, 9 times.
- You're absolutely right for $49500!
[...]