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?
(a) 69 (b) 70 (c) 40 (d) 45

• now avg age of 6 persons is(43-2)=41
  total age 41*6=246
  total age of 7 person = 45*7=315
  then the age of 7th person=(315-246)=69;
  other short process---
  now the avg age of6 person =41
  7th person make it 45, then the 6 other persons' age increase 4. total
  increased age=4*6=24.
  then 7th person's age i=24+45=69
• 13 years agoHelpfull: Yes(5) No(0)
• ans;let x be the avg
  x/6=43,x=258
  current avg 258-(12)=246
  let y be the age of 7 person
  then (y+246)/7=45
  y=69
• 10 years agoHelpfull: Yes(0) No(0)