What are the coordinates of the image of point A after the segment has been dilated by a scale factor of with a center of dilation at the origin?

So, at the beginning there are a total of 25*3=75 siblings (we can assume that each of them had exactly 3 siblings, that's what average means; that we can assume this).

Now we have 25+1=26 students and the number of siblings is 75+8=83

and the average is, and rounded it's 3.19.