30% of students fare is half of fare.That means 36students(120×36%) belong to half fare category that is equivalent to 72 students (36×2) of 1/4th fare.55% of students fare is Full,that means 66students(120×55%) belong to full fare category that is equivalent to 264 students (66×4)of 1/4th fare.
120 multiply with 30%=36 students have opted for half fare category means they are equivalent to 72 students(36 multiply with 2) of 1/4th category,120 multiply with 55%=66 students have opted for Full fare category which are equivalent to 264 students(66 multiply with 4) of 1/4th category.
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