the average of 5 members in a family is some %.after three year a baby is born and now the average of the family is same .what is the age of the baby.
a.3
b.2 1/2
c.2
d.none

• average=sum/no.of observations
  according to first condition let avg=17%
  sum=17*5=85
  after 3yeras only baby born so the age of 5 memebers also get increased 5*3=15
  85+15=100
  sum=17*6=102
  avg of 6 mem-avg of 5 mem
  102-100=2
• 10 years agoHelpfull: Yes(0) No(0)