Answer:
School A gave 12 correct and 12 incorrect answers. School B gave 12 correct answers and the competition was tied.
Step-by-step explanation:
We are given the following information:
School A points = 174
School B points = 102
Every correct answer is awarded 10 points and every incorrect answer reduces 6 points.
Let x be the number of correct answer given by school A and thus x is the number of incorrect answer given by school A. The, school B also gives x number of correct answer.
Thus, the scored can be modeled with the following equations:
School A: 
School B: 
Since, both the schools tied, equating both the equations:

Thus, school A gave 12 correct and 12 incorrect answers. School B gave 12 correct answers and the competition was tied.