Question: K How many two-element subsets can we choose from a five-element set? (Use row 5 of Pascal's triangle to find the answer. The number

K How many two-element subsets can we choose from a five-element set?

K How many two-element subsets can we choose from a five-element set? (Use row 5 of Pascal's triangle to find the answer. The number of different subsets of size 2 for a set of 5 elements is

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