in a group of 90 students , 30 are taking history , and 32 are taking statistics . if 59 students are taking history or statistics or both , then how many students are taking history but not statistics ?
"number of students taking history = h = 30 number of students taking statistics = s = 32 total number of students = t = 90 number of students taking history or statistics or both = b = 59 number of students taking neither history nor statistics = n = 90 - 59 = 31 letxbe the number of students taking both history and statistics . then t = h + s + n - x or 90 = 30 + 32 + 31 - x or x = 3 now , number of students taking only history will be h - x or 36 - 3 = 33 answer : - c"
subtract(30, subtract(add(30, 32), 59))