Answer
combinations
Work Step by Step
A permutation from a group of items occurs when no item is used more than once and the order of arrangement makes a difference.
A combination from a group of items occurs when no item is used more than once and the order of items makes no difference.
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In order to form this group,
it does not matter which volunteer is selected first, which is second, etc.
The order in which the volunteers are chosen makes no difference, so this problem involves
combinations.