Out of 52 students,35 can speak Hindi,32 can speak English,31 can speak German,20 speak both Hindi and english,18 speak both hindi and german and 24 both english and german.How many can speak all languages?

• Total = 52
  Hindi = 35
  English = 32
  German = 31
  Hindi and English = 20
  Hindi and German = 18
  English and German = 24
  
  Ans is 52 - ( (32+35+31)- (20+18+24)) = 16
• 10 years agoHelpfull: Yes(34) No(3)
• 16
  P(AuBuC) = P(A) + P(B) + P(C) – P(AnB) – P(AnC) – P(BnC) + P(AnBnC)
  so 16 can speak all language.
• 10 years agoHelpfull: Yes(27) No(2)
• 52=35+32+31-20-18-24+speak all languages
  speak all languages=16
• 10 years agoHelpfull: Yes(9) No(0)
• total 52 students
  h=35
  e=32
  g=31
  h&e=20
  h&g=18
  e&g=24 so 35+32+31=98=98-20-18-24=36 speak all languages....
• 10 years agoHelpfull: Yes(1) No(13)
• i thnk 4 is d ans
  
• 10 years agoHelpfull: Yes(0) No(13)