You should suspect a kidney injury anytime the patient presents with

A hematoma in the flank locale. A hematoma is a confined accumulation of blood outside the veins, due to either malady or injury including damage or surgery and may include blood proceeding to leak from broken vessels. A hematoma is at first in fluid shape spread among the tissues incorporating into sacs between tissues where it might coagulate and harden before blood is reabsorbed into veins. An ecchymosis is a hematoma of the skin bigger than 10mm.

This is what i did 45-5=4040÷4=10so there are 10 white marbles but am not sure is just a question that am not sure