In the lucky draw ceremony, the host will take out 1- 14 ping-pong balls and put them into the container. Four balls are randomly selected from 14 balls, regardless of numerical order. A * * can produce 100 1 possible combinations.
C( 14，4)= 14！ /4! 10! = 14* 13* 12* 1 1/(4*3*2* 1)= 100 1