At the time of starting of session, 50% students in Prof. Majid’s class told they love math and another 50% told they don’t. At the end of session, 70% told they love math and another 30% said they don’t. What can be the maximum no of students who changed their views?

• suppose there are 100 students
  after end of session those who hate maths change their mind
  therefore no. of students changed=50.
  those who love maths,out of which 30 students change their mind
  so total no. students changed their mind is 80 i.e. 80%
• 11 years agoHelpfull: Yes(27) No(5)
• love hate
  50 50
  after
  70 30
  we have to find max thrfore let 50% of haters now love maths thrfore 30% of d lovers now hates maths.
  so max no is 50+30=80%
• 11 years agoHelpfull: Yes(13) No(0)
• let the total number of students be 100
  50% love math=50
  50% hate math=50
  
  maximum number of students who changed their mind means the students who hated math turned into loving pals so
  
  3o%of hated earlier=30/100.50=15
  
  answer:15
• 11 years agoHelpfull: Yes(3) No(9)
• love math hate math
  50 50
  after end of session
  70 30
  so, the maximum no. of students who change their views :
  Let total no. of student be 100
  At maximum after start of session 50 student from both category can change their mind.
  So, in worst case if all the hate student changed their view then there has to be minimum 20 students in the love category who did not change their view in order to make total 70.
  
  thus all the students change their view except these 20. ie. 80 %
• 10 years agoHelpfull: Yes(3) No(0)
• plz explain
  
• 11 years agoHelpfull: Yes(0) No(1)