Given that Bill is on the school archery team. the target has a center bull's-eye and two rings around the bull's-eye.
Given the table below that gives the probabilities of outcomes.

The probability
that Bill will get the next arrow in the inner or outer ring is given by
P(inner ring) + P(outer ring) = 0.297 + 0.423 = 0.72
Therefore, the probability that Bill will get the next arrow in the inner or outer ring is 0.72