Question 883600
P(n,r) = (n!)/((n-r)!)


P(7,5) = (7!)/((7-5)!)


P(7,5) = (7!)/(2!)


P(7,5) = (7*6*5*4*3*2!)/(2!)


P(7,5) = 7*6*5*4*3


P(7,5) = <font color="red">2520</font>


There are <font color="red">2520</font> different ways to order them.