statistic & probability
posted by Anonymous .
An order of ward presentation has been devised for seven people: Jeff, Karen, Lyle, Maria, Norm, Olivia, and Paul. How many ways can the men be presented first and then the women?

Men: Jeff, Lyle, Norm, Paul
Women: Karen, Maria, Olivia
Number of arrangements of 4 men : 4!=24
Number of arrangements of 3 women : 3!=6
Number of arrangements for men first followed by women = 24*6=144