Question

how many combinations can be made using two yellow and one green blocks​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Suppose you have n types of items, and you wish to select a collection of r of them. We might want these items in some particular order. We call these sets of items permutations. If the order doesn’t matter, we call the set of collections combinations. For both combinations and permutations, you can consider the case in which you choose some of the n types more than once, which is called 'with repetition', or the case in which you choose each type only once, which is called 'no repetition'. The goal is to be able to count the number of combinations or permutations possible in a given situation.