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Berapa banyak cara untuk membuat gelang…

Mathematics Questions

Berapa banyak cara untuk membuat gelang dengan menyusun 1 manik-manik besar di antara 2 manik-manik kecil, jika terdapat 10 manik-manik kecil dengan warna berbeda dan 5 manik-manik besar dengan warna berbeda?

Short Answer

The bracelet consists of a repeating bead pattern of 1 big bead followed by 2 small beads, repeating 5 times with 5 big and 10 small beads. The total arrangements of beads can be calculated by multiplying the permutations of the big beads (5!) and the small beads (10!), resulting in a total of 5! ‚ãÖ 10! arrangements.

Step-by-Step Solution

Step 1: Understand the Bead Pattern

The bracelet follows a specific pattern that consists of alternating beads: 1 big bead followed by 2 small beads. This creates a repeating sequence labeled as BSS (where B is for big and S is for small). Since we have a total of 5 big beads and 10 small beads, this pattern will repeat exactly 5 times throughout the bracelet.

Step 2: Arrangement of Big and Small Beads

To find the number of arrangements, we need to consider the two types of beads separately. First, the 5 big beads can be arranged among themselves in 5! different ways since each big bead is a different color. Meanwhile, the arrangement of the 10 small beads will also be 10!, as they are all distinct as well.

Step 3: Calculate the Total Arrangements

The total number of unique arrangements of the beads in the bracelet can be calculated by multiplying the arrangements of big beads and small beads together. Therefore, the total number of ways to arrange the beads is given by the formula 5! ‚ãÖ 10!. This final step results in the complete calculation for forming the bracelet with the specified pattern.

Related Concepts

Bead pattern

A specific sequence of beads in a bracelet, defined as alternating types and sizes, e.g., 1 big bead followed by 2 small beads, creating a repeating sequence labeled as bss (big-small-small).

Arrangement

The different ways of organizing the beads of various types, calculated based on the individual’s characteristics (e.g., colors) where distinct items can be arranged in factorial ways.

Total arrangements

The overall number of unique configurations of beads in the bracelet, computed by multiplying the arrangements of each type of bead (big and small) together, represented mathematically as 5! ‚ãö 10!.