11.

Carrie missed 9.6% of the problems on a test. The test had a total of 125 problems. Which of the following is the best estimate of the number of problems Carrie missed?
123
13
2
113

12. The best estimate of the number of problems Carrie missed would be 12.

To calculate this, first find 9.6% of 125 by multiplying 0.096 by 125, which equals 12. So, Carrie missed approximately 12 problems on the test.