the average of the marks of 25 students in a class is 70 . if the marks of each student are doubled , find the new average ?
"sum of the marks for the 25 students = 25 * 70 = 1750 . the marks of each student are doubled , the sum also will be doubled . the new sum = 1750 * 2 = 3500 . so , the new average = 3500 / 25 = 140 . answer : a"
multiply(70, const_2)