At a conference, one team is made up of 4 men and 4 women. Four presenters are chosen to present the team's findings in front of the entire conference. How many different groups of presenters can be chosen from the team if a team cannot be composed of men only or women only? (Two groups of presenters are considered different if at least one presenter is different.)
Select
A) 120
B) 19
C) 180
D) 420
E) 460
No of ways = All ways to choose - ways using just men - ways using just women = C(8,4)-C(4,4)-C(4,4) = 21 - 1 - 1= 
<gadget id="calculator">21 - 1 - 1</gadget>
<output>19</output>
19   Answer is (19)
<result>B</result>
At a conference, one team is made up of 4 men and 4 women. Four presenters are chosen to present the team's findings in front of the entire conference. How many different groups of presenters can be chosen from the team if a team cannot be composed of men only or women only? (Two groups of presenters are considered different if at least one presenter is different.)