conversations.from: human
conversations.value: Five percent of the 300 senior students got a full merit college scholarship and ten percent of them got a half merit scholarship. How many senior students did not get any scholarships?
conversations.from: assistant
conversations.value: 300 x 5/100 = 15 senior students got a full merit scholarship.
  300 x 10/100 = 30 senior students got a half merit scholarship.
  So, a total of 15 + 30 = 45 students got scholarships.
  Therefore, 300 - 45 = 255 senior students did not get any scholarships.