What is 7P2?

The expression ( 7P2 ) represents the number of permutations of 2 items selected from a set of 7 distinct items. It is calculated using the formula ( nPr = \frac{n!}{(n-r)!} ), where ( n ) is the total number of items and ( r ) is the number of items to choose. For ( 7P2 ), this becomes ( \frac{7!}{(7-2)!} = \frac{7!}{5!} = 7 \times 6 = 42 ). Thus, ( 7P2 = 42 ).