Final answer:
The probability that Kirsty walks at least one way can be found by subtracting the probability that she doesn't walk at all from 100%.
Step-by-step explanation:
Answer:
The probability that Kirsty walks at least one way can be found by subtracting the probability that she doesn't walk at all from 100%. Let's assume that the probability of Kirsty walking alone is 77.08%. Since there are only two possible outcomes (she either walks or she doesn't), the probability that she walks can be calculated as:
P(Walk) = 100% - P(No Walk) = 100% - 77.08%
Therefore, the probability that Kirsty walks at least one way is approximately 22.92%.