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Six exams Maths, science, History, Economics, English and Hindi are to be scheduled starting from 2^(nd) March and ending on 8^(th) march with Sunday being an off day, not necessarily in the same order. Each of the exam has different time duration: 40 mins, 50 mins, 60 mins, 75 mins, 90 mins and 100 mins, again not necessarily in the same order. 8^(th) march is not sunday and an exam of 40 mins is scheduled on that day. Maths exam is for less than 60 mins and is scheduled immediately before English exam. There are two exams scheduled between Hindi exam which is for 100 mins and History exam which is for 60 mins. English exam is before Sunday and there are two days between sunday and maths exam. Economics exam which is for 75 mins is not scheduled on 2nd march. The exam schedules on saturday is of 100 mins. Which of the following combinations of exam-Day-Time Duration is correct ?

What is the chemical name of the soap prepared from castor oil ?

What is the respective ratio of the numbers of candidates failing in the exam from city D to those failing in the exam from city A ?

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What is the percentage of qualified aspirants with respect to appeared aspirants from states B and C taken together? (Rounded off to two decimal places.)