In a shopping mall with staff of 5 members the average age is 45 years. After 5 years a person joined them and the average age is again 45 years. What is the age of 6th person?

• Ans 20 yrs
  
  sol: avg age of 5 person after 5 yrs will be 50 yrs..
  so total age of 5 person = 50*5=250
  and total age of 6 person = 45*6=270
  so age of 6th person= 270-250= 20 yrs
• 13 years agoHelpfull: Yes(48) No(5)
• Total initial age=45*5=225
  after 5 years total age of 6 will be = 225+25+K
  where K is age of 6th person
  so
  (250+k)/6=45
  solving.....k=20 yrs
• 13 years agoHelpfull: Yes(22) No(3)
• after 5 years avg age of 5 persons=(45+5)=50
  sum of ages of 5=50*5=250
  after one more person joined sum is=250+x
  avg age of 6 persons=(250+x)/6=45
  age of 6th person is=20years
  
  
  
  
  
  
• 13 years agoHelpfull: Yes(10) No(4)
• the age of 6th person is 45 years
• 12 years agoHelpfull: Yes(4) No(17)
• ANS IS:20
  5 members the average age is 45 years=5*45=225
  After 5 years =250
  After 5 years 6th person joined the average age is again 45 years=6*45=270
  age of 6th person=270-250=20
  
  
• 9 years agoHelpfull: Yes(3) No(0)
• right now avg. age is 45*5=225
  
  after 5 yrs avg. age will be (225+10+x)/6=45 (x is age of the 6th person)
  
  on solving x=35
  hence 35 is the answer
• 13 years agoHelpfull: Yes(2) No(29)