Q. In a class there are 150 people who speak English and 125 people who speak Hindi. 55 speak
both languages and at least one student speaks one language.
1) How many students speak at least one language? (220)

• 150+125-55=220
• 11 years agoHelpfull: Yes(9) No(3)
• Speak English:n(E)-150
  Speak Hindi:n(H)-125
  55 speak both languages i.e n(E and(intersection) H)-55
  Students speak at least one language:n(E or(union) H): n(E)+n(H)-n(E and H)=150+125-55=275-55=220
  
• 10 years agoHelpfull: Yes(9) No(1)
• P(E)= 150
  P(H)= 125
  P(E)U P(H)= 55
  P(E)AND P(H)=P(E)+ P(H) - P(E)U P(H)
  P(E)AND P(H) = 150 +125 - 55 = 120
  
  
  
• 11 years agoHelpfull: Yes(6) No(10)
• ans: 165
  this is solved by venn diag
  let x be the number of students speaking only english
  let y be the number of students speaking only hindi
  let z be the number of students speaking both
  x+z=150
  y+z=125
  z=55
  
  x=95 y=70 x+y=165
• 11 years agoHelpfull: Yes(4) No(6)
• Ans- 220
  Students speaking only English 150-55=95
  Students speaking only Hindi 125-55=70
  Students speaking both 55
  
  Student speaking at least a language 95+70+55= 220
  
• 10 years agoHelpfull: Yes(2) No(0)