6 persons standing in queue with different age group, after two years their average age will be 43 and seventh person joined with them. hence the current average age has become 45. find the age of seventh person?
option
(a) 69
(b) 70
(c) 40
(d) 45

• let x be the total age of 6 person.so after 2 years the total will be (x+12).
  (add 12 since 2 years is added for 6 persons)
  avg= (x+12)/6=43 . so x=246
  seventh person is added so (246+y)/7=45 . on solving we get y as 69
• 13 years agoHelpfull: Yes(8) No(1)
• ans is a)69
  there are 6 persons after two years there avg years will be 43.
  so obviously now there average year is 41.
  so sum of 6 persons age is 246.
  the current avg age has become 45.
  45*7=315
  315-246=69.
• 13 years agoHelpfull: Yes(3) No(2)
• after 2 years avg age= 43
  thus present avg age=41
  when seventh person joins then avg age =45
  i.e. his age increment the avg age by 4
  thus his age = 45+4*6= 69
  ans: a
• 13 years agoHelpfull: Yes(2) No(1)