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

• ANS WILL BE 69......
  SOLN- SINCE AVG AGE OF 6 PERSONS AFTER TWO TEARS IS 43....SO PRESENT AVG AGE WIL BE 41 YRS..THEREFORE TOTAL AGE=41*6=246.....NOW THE 7 TH PERSON JOINS IN AND THE CURRENT AVG BECOMES 45..THEREFORE TOTAL CUURENT AGE=45*7=315..
  THE 7TH PERSON AGE WILL BE (315-246)=69...
• 13 years agoHelpfull: Yes(98) No(2)
• let age of 6 persons is 'x'
  ans:69
  solution:
  after two years age will be =(x+12)
  average age=43
  therefore (x+12)/6=43 ->x=246
  (x+7th person age)/7= (246+7th person age)/7=45(average age)
  (by solving) the 7th person age is 69
  
• 13 years agoHelpfull: Yes(24) No(5)
• thi is 69
  
• 13 years agoHelpfull: Yes(3) No(4)
• 43=age after 2 yrs i.e., 41=current average age
  6 prsns avg=(6*41)=(246) 7 prsns avg=(7*45)=(315)
  age of 7th person =(315-246) =69
• 9 years agoHelpfull: Yes(3) No(0)
• after 2 years the average age of 6 persons is 43.
  total age of 6 persons after 2 years is 43*6=258.
  as it is after 2 years , to find the present average age of 6 persons 258-12=246.
  present average age of 7 persons is 45*7=315.
  so to find the 7th person age 315-246=69.
• 9 years agoHelpfull: Yes(2) No(0)
• ans 69...69+6*41/7
• 12 years agoHelpfull: Yes(1) No(0)
• Let combined age of 6 person =x
  And age of 7th person = y
  After 2 yr average ages of 6 person is i.e (x+12)/6 =43 ......equation(1)
  Then including 7th person its average will be 45
  I.e (x+y)/7 = 45 ..equation(2)
  After solving value of y = 69
  So age of 7th person is ..69
• 8 years agoHelpfull: Yes(1) No(0)
• after 2 years avg of 6 persons is 43 means currently it is 41 .
  after adding 7th person avg becomes 45 so
  41+4=45 so add it six times into seventh persons age
  45(7th persons age)+4*6= 69
  
• 11 years agoHelpfull: Yes(0) No(0)
• it is given that there are 6 person
  and after tow years their average become 43.
  so 2 years before average age =41
  then total age two year before=41*6=246
  total age of 7 person=thier average*no of person=45*7=315
  so average age of 7 person-avf age of 6 person=age of 7 person
  315-246=69
  ans is 69
  
• 10 years agoHelpfull: Yes(0) No(1)
• Let 7 persons be a,b,c,d,e,f,g
  
  avg of 6 persons after 2 yrs = (a+b+c+d+e+f+2*6)/6 = 43
  a+b+c+d+e+f = 43*6-12
  = 246
  avg of 7 persons at present=(a+b+c+d+e+f+g)/7=45
  246+g=45*7
  g=69
  
  Therefore,7th person age=g=69
  
  
  
  
  
• 9 years agoHelpfull: Yes(0) No(1)
• 
  43*6 = 258
  present avg = (258-(6*2))/6 = 41
  gap= 45-41 = 4
  4*7 =28
  so age of 7th person = 41+28=69:)
  
• 9 years agoHelpfull: Yes(0) No(0)
• 6x+12/6=43
  so 6x=246
  now 246+y/7=45
  y=69
• 5 years agoHelpfull: Yes(0) No(0)