1 A fair spinner has ten sectors, labelled \(1,2 , \ldots , 10\). In order to start a game, Kofi has to obtain an 8,9 or 10 on the spinner.
- Find the probability that Kofi starts the game on the third spin.
- Find the probability that Kofi takes at least 5 spins to start the game.
- Determine the probability that the number of spins required to start the game is within 1 standard deviation of its mean.