To calculate the number of possible combinations from 10 items, you can use the formula for combinations, which is nCr = n! / r!(n-r)!. In this case, n is the total number of items (10) and r is the number of items you are choosing in each combination (which can range from 1 to 10). So, if you are considering all possible combinations (r=1 to 10), the total number of combinations would be 2^10, which is 1024.
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6 different combinations can be made with 3 items
If repeats are allowed than an infinite number of combinations is possible.
Do a web search for "permutations and combinations" to find the how. I make it 35,960.
There are 5C3 = 10 combinations.
There are 167960 combinations.