On average, she spent 18/36 = 0.5$
0.875 is the density for this question
There will be 6 groups so we divide 27 by 6 which equals 4.5. soo each group will be getting 4. everyone would get atleast one with 3 left over.
Here is the answer for the 1st one. I have a picture of the second one but I’m not sure if I can post the picture of it
Do you have the rest of the question?