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How many ways are there to arrange 6 different beads in a straight embroidery line?

Answer and explanation

Correct answer: 720

The governing concept is permutation of distinct objects in a straight line. Since all six beads are different and every bead is used once, changing their left-to-right order creates a new arrangement. The first position has 6 choices, the second has 5 remaining choices, followed by 4, 3, 2, and 1. Therefore, the multiplication principle gives 6 × 5 × 4 × 3 × 2 × 1 = 6! = 720. Option B is correct. Option C, 120, is 5! and omits one factor. Option A, 360, is only half of the required total, while option D, 36, does not represent all possible orders. Since the beads are placed in a straight line, no circular-arrangement adjustment such as division by 6 is appropriate.

Related tags

PermutationsStraight-Line ArrangementFactorialClass 11Permutations And CombinationsMathematicsClass 11 Mcq

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