40. A student gets an aggregate of 60% marks in five subjects in the ratio 10 : 9 : 8 : 7 : 6. If
the passing marks are
50% of the maximum marks and each subjects has the same maximum marks, in how
many subjects did he pass
the exam

• 4 subjects
  
  Suppose each subject has max marks of 100,
  and 10x,9x,8x,7x,6x are marks obtained in each subject, then
  40x=300
  x= 7.5
  Marks obtained in different subjects are 75,67.5,60.0, 52.5, 45.
  Hence Marks obtained in different subjects are 75%,67.5%,60.0%, 52.5%, 45%.
  
  So he passed 4 subjects .
• 12 years agoHelpfull: Yes(34) No(3)
• Assume the max. Mark for each subject is 100
  60% total mark = 60/100 *500=300
  10x+9x+8x+7x+6x=300
  40x=300
  x=7.5
  
  mark for each subject
  10x = 75
  9x = 67.5
  8x = 60
  7x = 52.5
  6x = 45
  
  50% is the pass mark that is.,50 marks..
  
  Only one subject is below the pass mark
  
  so he passed in 4subjects...
• 12 years agoHelpfull: Yes(22) No(1)
• he passed in four subjects..
  total fractions of marks is 10+9+8+7+6=40
  total mark obtained is 60% * 5 = 300% of maximum mark
  so we can calculate mark obtained in each subjects
  1st = 10/40* 300% = 75% pass
  2nd = 9/40* 300% = 67.5% pass
  3rd = 8/40 * 300 = 60% pass
  4th = 7/40 * 300% = 52.5% pass
  5th = 6/40 * 300 = 45% fail
  hence the student passed in four subjects
• 12 years agoHelpfull: Yes(6) No(3)
• they given the 60 % mark ratio 10:9:8:7:6 let mark in sub 10x 9x 8x 7x 6x
  so 10x+9x+8x+7x+6x/5=60
  40X=300
  X=7.5
  therfore 4 subject
• 12 years agoHelpfull: Yes(2) No(4)
• total marks = 40x
  total maximium = 200x/3
  maximum in a subject = 40x/3
  
  passing marks = 20x/3 = 6.67x
  
  thus he passed in 4 exams and failed in 1
• 12 years agoHelpfull: Yes(1) No(0)