In an examination,35% candidates failed in one subject and 42% failed in another subject while 15% failed in both the subjects.If 2500 candidates appeared at the examinations,how many passed in either subject but not in both?

• (35-15)%=20% failed in first subject but passed second,
  (42-15)%=27% failed in second subject but paased first.
  (35-15)%+(42-15)%=47%,who failed or passed in either in 1 sub or in another,and is=1175.
  
  candidates failed in both subjects=15% of 2500=375,
  candidates who passed in both subject,is=100%-(47+15)%=38% of 2500=950.
  
  
  
• 10 years agoHelpfull: Yes(2) No(1)
• subject one failed candidates are 35/100*2500=875
  
  subject two failed candidates are 42/100*2500=1050
  
  Both the subject failed candidates are 15/100*2500=375
  
  Both Subject passed candidates
  
  =2500-(875+1050-375)
  =2500-1550
  =950
  
  Total Failed candidates are
  =875+1050-375
  =1550
  
  Either subject one or subject two passed candidates are
  =1550-375
  =1125
  
  
  
• 10 years agoHelpfull: Yes(2) No(1)
• if 35 failed in A and 42 in B and 15 in both
  those failing in A or B but not in A and B is
  p(Au(notB))+p((notA)uB)=p(a)+p(b)-2p(AnB)
  =42+35-30
  =47%
  1175
• 7 years agoHelpfull: Yes(0) No(0)