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 55% average total marks, it is necessary for him in third yearly examination to secure marks : Choose the most appropriate option:
A) 300 B) 325 C) 400 D) 450 E) 500
total marks:1500 for three exams   55% of 1500=825   first exam marks=45% of 500=225   second exam marks=55% of 500=275   let X be the third exam marks   225 + 275 + X =825   X=325   ANSWER:325
<result>B</result>
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 55% average total marks, it is necessary for him in third yearly examination to secure marks :