In an examination, the candidates are awarded the following grades depending on the marks scored by them Distinction: 280% first class: 60% marks 80%, second class, 45% marks 60% third class. 30% marks 45% fail :< 30% marks It was found that 8% of the students failed and 8% have scored distinction. Find the average marks obtained by the candidates. Deduce percentage of students placed in the second class. Assume normal distribution of marks.
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the number of students is 53
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