Permutation: A set of objects in which position (or order) is
important. Example: a,b, c, d
{a, b, c, d} | {a, b, d, c} | {a, c, b, d} | {a, c, d, b} | {a, d, b, c} | {a, d, c, b} | {b, a, c, d} | {b, a, d, c} | {b, c, a, d} | {b, c, d, a} | {b, d, a, c} | {b, d, c, a} | {c, a, b, d} | {c, a, d, b} | {c, b, a, d} | {c, b, d, a} | {c, d, a, b} | {c, d, b, a} | {d, a, b, c} | {d, a, c, b} | {d, b, a, c} | {d, b, c, a} | {d, c, a, b} | {d, c, b, a} (total: 24)
Combination: A set of objects in which position (or order) is NOT
important. Example:a,b, c,d =1 combination only. The order of the letters DOES NOT MATTER.