5. What is the age of Principal?
(A) There are 14 students in a class.
(B) The average age of students and Principal is 16 years.
(C) The average of 14 students is 3 less than the average age of 14 students and Principal.

1) Both (A) and (B)
2) All (A), (B) and (C)
3) Both (B) and (C)
4) Both (A) and (C)

• ans>3
  let x be the sum of the age of student and principal
  so x/15=16 (from b)
  x=240
  avg age of student (16-3)=13 (from c)
  sum of student age=13*14=182
  hence principal age will be=240-182
  =58
• 8 years agoHelpfull: Yes(13) No(5)
• all options are required... a b & c
• 8 years agoHelpfull: Yes(3) No(7)
• option c- both B & C
  AVG OF student +principal is 16
  avg of 14 student = 3- avg of 14 student + principle
  = 11
• 8 years agoHelpfull: Yes(3) No(1)
• All options are required.....icheck C they mentioned average of 14 students ,they didnt mentioned how many students....
• 8 years agoHelpfull: Yes(1) No(1)
• The answer will be A
  
  let x be the sum of the age of student and principal
  we get that there are 14 students (from a)
  thus, 14+1=15( total number of students + principal)
  
  x/15=16 (from b)
  x=240
  avg age of student (16-3)=13 (from c)
  sum of student age=13*14=182
  hence principal age will be=240-182
  =58
  
  
• 8 years agoHelpfull: Yes(0) No(1)
• answer: 2 because if we don't consider a statement we will not know the number of students are present in the class
• 6 years agoHelpfull: Yes(0) No(0)
• All are required
  for B we can't determine the total number of students without A.
• 4 years agoHelpfull: Yes(0) No(0)