Problema Solution
mr.lewis is so boring that when he started talking 1/2 of his students left soon 1/3 left then 1/4 left at the end there was only 90 students left how many students where there in the beginning
Answer provided by our tutors
let 'x' represent the number of students in the beginning
(1/2)x + (1/3)(x - (1/2)x) + 1/4(x - (1/3)(x - (1/2)x)) + 90 = x
by solving we find:
x = 720 students
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there were 720 students in the beginning.