Answers

2015-11-18T13:17:52+05:30
B's improvement=(new marks-original marks)/original marks *100%
                       = (12-10)/10*100%=20%
A's improvement=(new marks-original marks)/original marks*100%
                       =(14-12)/12*100%=16.6666666666666666666%
therefore, B showed more improvement(though the increase in marks is equal, percentage is completely different)
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