There are 1 hits out of 8 guesses. The expected number of hits (chance only) is 1.6
The probability of 1 hits out of 8 guesses is 0.33554432, or about 1 chance in 3.
The probability of 1 or more hits out of 8 guesses is 0.83222784, or about 1 chance in 1.
The probability of 1 hit out of 1 guess is 0.2, or 1 chance in 5.