CAT Exam

AABABCABCD..........Z
In 58th position which english alhpabet will be coming?

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CAT Other Question

in a class if 5 students are seated in a bench then 2 benches will be vacant.if 4 students are seated in a bench then 10 students will not have benches to sit.then the number of students and benches in the class are the results of the examination in two papers A and B for 20 candidates were as follows.
8 candidates passed in A
7 candidates passed in B
8 candidates failed in both
out of these candidates one is selected.what is the probability he passed in both these papers?