100 choose 2
Choosing 2 from 100— order doesn't matter.
Combinations (order doesn't matter)
100C2 = 4,950
Permutations (order matters): 100P2 = 9,900
There are 4,950 ways to choose 2 items from 100when order doesn't matter, using the formula C(n, k) = n! / (k! · (n − k)!).
100 choose k table
| Expression | Combinations |
|---|---|
| 100 choose 2 | 4,950 |
| 100 choose 3 | 161,700 |
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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 100 choose 2?+
100 choose 2 equals 4,950. It counts the number of ways to choose 2 items from 100 when the order does not matter.
What is the formula for 100 choose 2?+
The combinations formula is C(n, k) = n! / (k! · (n − k)!). For 100 choose 2: 100! / (2! · 98!) = 4,950.