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 examination to secure marks :
(A) 300 (B) 350
(C) 400 (D) 450

• ans:400
  total marks:1500 for three exams
  60% of 1500=900
  first exam marks=45% of 500=225
  second exam marks=55% of 500=275
  let X be the third exam marks
  225 + 275 + X =900
  X=400
  
• 13 years agoHelpfull: Yes(48) No(1)
• Ans 400
  in order to get overall 60 % total.
• 13 years agoHelpfull: Yes(4) No(4)
• Ans:-300
  the avg marks of each exam=500
  avg marks of first yearly exam=45%500=225
  avg marks of second yearly exam=55%(500)=275
  in third yearly exam he secured 60% of avg marks=60%500=300
• 13 years agoHelpfull: Yes(2) No(20)
• first we need to find increase in average 45+55+x/3=60 x=80% to increase avg by 60% he has to increase by 80% so 80/100 *500=400
• 12 years agoHelpfull: Yes(0) No(3)
• (225+x)/2=55*500/100
  x=325
  (325+225+y)/3=60*500/100
  y=350
  
• 12 years agoHelpfull: Yes(0) No(9)
• average % of total marks=60%
  x=avg %marks secured in test three
  60=(45+55+x)/3
  180=45+55+x
  180-100=x
  x=80
  marks secured in test 3=80*500/100=400
  
• 9 years agoHelpfull: Yes(0) No(0)
• Average percentage marks 45%+55%+x=60%
  let (45+55+80)/3 =>60%(to get three average marks of three exams)
  now simply solve, 80/100*500=400
  ANS = 400
• 5 years agoHelpfull: Yes(0) No(0)