The table below shows how many coaches work with each of the major sports teams at Kristensen School. Although no single coach works with all three teams, 3 coaches work with both the Track and Tennis teams, 2 coaches work with both the Track and Baseball teams, and 1 coach works with both the Tennis and Baseball teams. How many different coaches work with these three teams?
Sports No of coaches
Track 9
Tennis 5
Baseball 4
Choose the correct choice from the following answers.
A) 6
B) 9
C) 11
D) 12
E) 17
X = 9 + 5 + 4 - (3 + 2 + 1)= 
<gadget id="calculator">9 + 5 + 4 - (3 + 2 + 1)</gadget>
<output>12</output>
12   Answer is 12
<result>D</result>
The table below shows how many coaches work with each of the major sports teams at Kristensen School. Although no single coach works with all three teams, 3 coaches work with both the Track and Tennis teams, 2 coaches work with both the Track and Baseball teams, and 1 coach works with both the Tennis and Baseball teams. How many different coaches work with these three teams?
Sports No of coaches
Track 9
Tennis 5
Baseball 4