How many combinations in 4 numbers?

To find the number of combinations of 4 numbers, you need to specify how many numbers you are choosing from a larger set. For example, if you want to choose 4 numbers from a set of 10, the number of combinations can be calculated using the formula for combinations, which is ( C(n, r) = \frac{n!}{r!(n - r)!} ). In this case, it would be ( C(10, 4) = \frac{10!}{4!(10 - 4)!} = 210 ). If you provide a specific total set size, I can give you the exact number of combinations.