instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: a certain experimental mathematics program was tried out in 2 classes in each of 38 elementary schools and involved 44 teachers . each of the classes had 1 teacher and each of the teachers taught at least 1 , but not more than 3 , of the classes . if the number of teachers who taught 3 classes is n , then the least and greatest possible values of n , respectively , are
answer:
0 and 16

question:
Problem: in what time will a train 50 m long cross an electric pole , it its speed be 360 km / hr ?
answer:
0.5

question:
Problem: a bakery has 6 employees . it pays annual salaries of $ 19,000 to each of 2 employees , $ 21,000 to 1 employee , and $ 22,000 to each of the remaining 3 employees . which number is closest to the average ( arithmetic mean ) annual salary of these employees ?
answer:
$ 20,800