Concept: The question tests on the application of the knowledge of averages.
Let there be x students in Group A and y students in Group B.
Let sum of scores in Group A = a and that of Group B =b.
Hence the average of Group A = a/x and the average of Group B = b/x.
We are asked if average of Group A> average of Group B
or if a/x > b/x ?
St (1):- Of the students who took the test, 10 were in Group A and 12 were in Group B.
Given x=10,y=12 but we are not aware of the values of a and b. (Insufficient)
St(2):- On the test, the highest score achieved was achieved by a Group B student and the lowest score achieved was achieved by a Group A student.
No specific information regarding the value of a, b, x, y is provided. (Insufficient)
On combining both, we still do not have the specific values of a, b, x, y. (Insufficient)
Thus option (e)