Since we want the order in which items are picked, we are talking about permutations and not combinations.
Using the permutation formula, our n becomes 7, because this is the total of subsets we have, while 2 is the one we are looking for (items).
Thus, to pick two items from seven, we have:
[tex]^{7}P_2 = \frac{7!}{(7 - 2)!}[/tex]
[tex]= \frac{7!}{5!} = 7 \cdot 6 = 42[/tex]
Thus, we have 42 ways to pick two items from seven if we wanted order.
