A camp counselor took a survey of the 25 campers he had in his group to determine which activity the campers were most interested in. He found that 7 were interested in ziplining, 6 were interested in fishing, 9 were interested in horseback riding, and 3 were interested in a ropes course. If there are 150 campers, what is a reasonable estimate that the camper will be interested in ziplining?