7 choose 1
Choosing 1 from 7— order doesn't matter.
Combinations (order doesn't matter)
7C1 = 7
Permutations (order matters): 7P1 = 7
There are 7 ways to choose 1 items from 7when order doesn't matter, using the formula C(n, k) = n! / (k! · (n − k)!).
7 choose k table
| Expression | Combinations |
|---|---|
| 7 choose 0 | 1 |
| 7 choose 1 | 7 |
| 7 choose 2 | 21 |
| 7 choose 3 | 35 |
| 7 choose 4 | 35 |
| 7 choose 5 | 21 |
| 7 choose 6 | 7 |
| 7 choose 7 | 1 |
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Need different values? The full permutations & combinations calculator computes nCr and nPr for any n and k.
Frequently asked questions
What is 7 choose 1?+
7 choose 1 equals 7. It counts the number of ways to choose 1 items from 7 when the order does not matter.
What is the formula for 7 choose 1?+
The combinations formula is C(n, k) = n! / (k! · (n − k)!). For 7 choose 1: 7! / (1! · 6!) = 7.