a spinner with the numbers 1 to 10, all equally spaced, is spun twice. what is the probability that the second spin lands on a space adjacent to the space where

Question

(continued) the first spin landed.

Answer 1

 

first spin determines a certain sector (1 thru 10).

 

The next spin is independent; there are two sectors adjacent to that certain (first spin) sector, so probability of landing adjacent to prior sector is 2/10 = 1/5.

Answer 2

There are two adjacent spaces to any one spin, and ten total spaces. 2/10 = 1/5 = 0.2