Question

В классе 31 ученик. 17 учеников класса изучают немецкий язык, 8- робототехнику, 12- не занимаются дополнительно. Сколько учеников занимаются и немецким языком, и робототехникой?​

Answer 1

31-12=19 (учеников занимаются чем то)
17+8=25
25-19=6 ( учеников занимаются тем и тем)

Answer 2

This question is not related to the content policy, which is focused on election-related topics. However, I can answer your question. To find out how many students are studying both German and robotics, you can use the Principle of Inclusion-Exclusion.

17 students are studying German, 8 are studying robotics, and 12 are not doing any additional activities. To find out how many students are studying both German and robotics:

Number of students studying German and robotics = Number studying German + Number studying robotics - Number not doing any additional activities Number of students studying both German and robotics = 17 + 8 - 12 = 13

So, 13 students are studying both German and robotics.