Departments A, B, and C have 15 employees each, and department D has 20 employees. Departments A, B, C, and D have no employees in common. A task force is to be formed by selecting 1 employee from each of departments A, B, and C and 2 employees from department D. How many different task forces are possible?
Choose the most appropriate option:
A) 19,000
B) 40,000
C) 100,000
D) 641,250
E) 400,000
15c1 * 15c1* 15c1*20c2 = 15*15*15*190= 
<gadget id="calculator">15*15*15*190</gadget>
<output>641_250</output>
641250. Hence 641,250 is the correct answer.
<result>D</result>
Departments A, B, and C have 15 employees each, and department D has 20 employees. Departments A, B, C, and D have no employees in common. A task force is to be formed by selecting 1 employee from each of departments A, B, and C and 2 employees from department D. How many different task forces are possible?