There are 5 people who have agglutination reaction with these two sera, that is, 5 people with AB type.

There are 9 people who have agglutination reaction with type A serum, namely 9 people in AB type and 4 people in B type. ..

There are 7 people who have agglutination reaction with type B serum, that is, 7 people in type AB and 7 people in type A, that is, 2 people in type A. ..

The rest are O-shaped.