## Task 3 - 220523

The following information is available about the 650 students of a school:

500 students are members of a sports working group.

400 students are members of another working group.

100 students are not members of any working group.

From this information, it should be determined how many of the 650 students are members of both a sports working group and another working group.

Explain how this number can be found!
Due to $650-100=550$, 550 students are members of at least one working group.

Due to $550-400=150$, of these 550 students, 150 are members of only one sports working group. Among the 500 members of sports working groups, due to $500-150=350$, 350 students are also members of another working group.