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Question Asked by a Student from EXXAMM.com Team
Q 2422845731.     A student on her first 3 tests received an average score
of N points. If she exceeds her previous average score
by 20 points on her fourth test, then what is the
average score for the first 4 tests ?
IAS 2011 Prelims
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)