In three annual examinations of which the aggregate marks of each was 500 a student secured average ...........

Quantitative Aptitude ( CCS) Average

In three annual examinations of which the aggregate marks of each was 500, a student secured average marks 45% and 55% in the first and the second yearly examinations respectively. To secure 60% average total marks, it is necessary for him in third yearly

300

350

400

450

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Explanation:

Aggregate marks in each exam = 500
Marks obtained in first exam = 45% of 500 = 225
Marks obtained in second exam = 55% of 500 = 275
Total marks in three exam = 500*3 = 1500
Marks needed to get 60% = 900
Marks obtained in first two exams = 225+275 = 500
So, marks needed in third exam = 900-500 = 400.

Hence, option 3 is the correct answer.