The excercise that I need help with is based on a study of a sporting-goods store in which it was found that out of 348 customers who parked in the store's parking lot, 287 made at least one purchase, whereas of 518 customers who did not use that lot, 305 made purchases.
- Estimate the probability that the next customer who comes into the sporting-goods store will make at least one purchase.
I'm not sure what to do here...maybe at 287 + 305 over 348 + 518? That's probably WAY off. Please help! Thank you!