Introduction
This paper focuses on various tests to determine whether there is need for Red Cross to sort/classify the blood into the various blood types; type A, type O, AB, or B. The aim is to allow the Red Cross to know the supply of each blood type available at any time to help people in need. Another advantage of sorting the blood into various types is that blood can then be stored in a safe place under the right conditions to prevent the blood from spoiling. The paper begins with analysis ...