Mathematics Practice and Examination in Grade One of Junior High School
Group 1: a
Group 2: (1/2)a+6
Group 3: (3/2)a+6
The fourth group: 50-(3/2) A-6 = 44-(3/2) A.
When a= 14, the second group has 13 people, the third group has 27 people, and the sum of the first three groups is 54 >: 50, which does not meet the grouping.