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In a group of 40 employees, 25 work in sales (\(S\)), 20 in marketing (\(M\)), and 12 in both. How many employees:
work in at least one department?
7
8
9
4
5
6
1
2
3
C
0
.
work in sales but not marketing?
7
8
9
4
5
6
1
2
3
C
0
.
work in exactly one department?
7
8
9
4
5
6
1
2
3
C
0
.
work in neither department?
7
8
9
4
5
6
1
2
3
C
0
.
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