Ten years ago , the ages of the members of a joint family of eight people added up to 231 years. Three years later, one member died at the age of 60 years and a child was born during the same year. After another three years ,one more member died again at 60, and a child was born during the same year. The current average of this eight-member joint family is?
X A.
21 years
B.
22 years
C.
23 years
D.
24 years
E.
25 years

• Ten years ago, Added age of family = (Added age of 8 members) =231
  
  After 3 years, Added age of family = 231+ (Increase of age for 3 years) - (age of died member) + (age of new member)
  = 231+(8*3)-60+0 = 195
  
  After 3 years, Added age of family = 195 + (Increase of age for 3 years) - (age of died member) + (age of new member)
  = 195+24-60+0 = 159
  
  After 4 years (at present), Added age of family = 159 + (Increase of age for 4 years) = 159+32 = 191
  So, the current (at present) avg. age of the 8 member family = 191/8 = 23.875 years
  so, the answer is "option d. 24 years ".
• 8 years agoHelpfull: Yes(1) No(0)