There are 25 students. Average number of siblings for each student is 3. A new student with 8 siblings joins the class. The average number of siblings that each student has is?
To find average you add then divide by how many. So, we can reverse because ? divided by 25 = 3 75 would be the mystery number because of the equation above. If you add 8 to 75 then divide by 26 ( new student ) you get 3.19230769
