FREQUENCY OF BLOOD TYPES
"O+" 1 person in 3
"O-" 1 person in 15
"A+" 1 person in 3
"A-" 1 person in 16
"B+" 1 person in 12
"B-" 1 person in 67
"AB+" 1 person in 29
"AB-" 1 person in 167