Mrs White has 3 children whose average age is 12 years, and her neighbour Mrs Green has 2 children whose average age is 7 years. the average age of the 5 children is?
Last edited by Spixol123; September 30th 2012 at 07:20 AM.
Mrs White has 3 children whose average age is 12 years, and her neighbour Mrs Green has 2 children whose average age is 7 years. the average age of the 5 children is?
First, I recommend posting problems in the appropriate forums. They will get more attention that way.
For this problem, you may use a weighted average to find the mean of the ages for the five children: