Your Answer is

Correct Answer is H

Explanation

Because the gym class has the most comprehensive information, let's start with the gym class first. A total of 10 teachers hand in at least one class of gym. 2 teachers only teach gym. 6 teachers only teach gym and science. 1 teacher teaches gym, science and math. According to the above information, we know that there is one teacher who only teaches gym and math. Now let's further analyze math through the implicit information we inferred. A total of 12 teachers handed in at least one class of math. 1 teacher only teaches gym and math. 5 teachers only teach math and science. 1 teacher teaches gym, science and math. Therefore, we can infer that there are 5 teachers who only teach math. Therefore, choose H

or draw a picture. According to the numbers in the chart, you can know the number represented by the area. The number of people who only teach math is the yellow area, and you must know the value of the orange area x. Orange area x=10-2-6=2. The value of the yellow area is 12-5-2=5