15. John runs a computer software store. He counted 124 people who walked by his store in a day, 52 of whom came into the store. Of the 52, only 21 bought something in the store. Estimate the probability that a person who walks by the store will enter the store. Round your answer to the nearest hundredth. a. 0.59 b. 0.25 c. 0.42 d. 0.17