7P2 — Permutations of 7 Things Taken 2 at a Time
7P2 equals 42 — there are 42 ordered arrangements of 2 items chosen from 7.
How to use this tool
- Enter n (total items) and r (items chosen) in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your npr and the full breakdown beneath it.
7P2 finds how many ordered pairs can be picked from a set of 7 items.
Frequently asked questions
- What is a permutation?
- A permutation is an ordered arrangement. nPr = n!/(n-r)!. For example, P(5,2) = 5×4 = 20 ordered pairs from 5 items.