In a group of 15, 7 have studied Latin, 8 have studied Greek and 3 have not studied either. How many of the

• WITH OUT THE COMPLETE QUESTION HOW CAN WE ANSWER
• 12 years agoHelpfull: Yes(7) No(2)
• here take latin reader n(a)=7
  here take greek reader n(b)=7
  group of 15 means n(u)=15
  and !n(a^b)=3
  n(aUb)=15-3=12
  so number of students who studies either subjects=12
  now n(aUb)=n(a)+n(b)-n(a^b)
  n(a^b)=n(a)+n(b)-n(aUb)
  =7+8-12=3;
  so number of students who study both=3;
  
• 12 years agoHelpfull: Yes(3) No(1)