Equation help please

Question

What is the equation here?

1 person is playing a game guessing a number and has odds of 1/256 so they get the right answer every 4minutes. What if 10 people are playing the same game independently? What does this equation look like? TIA

Answer 1

If a person plays the game and gets an odd of 1/256 every 4min.

The for 10 person,then the odd for ten persons is 0.04 for every 4 minutes.