Ask Question
31 March, 09:12

In a set of dominoes, each piece is marked with two numbers, one on each end. the pieces are symmetrical so that the two numbers are unordered. that is, the combination (2, 6) and (6, 2) are not distinguishable. how many pieces can be formed using the numbers 1, 2, ..., 12?

+5
Answers (1)
  1. 31 March, 10:08
    0
    That would be the number of combinations of of 2 from 12 + the number of doubles (1 and 1, 2 and 2 and so on).

    = 12C2 + 12

    = (12*11) / 2 + 12

    = 66 + 12 = 78 Answer
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “In a set of dominoes, each piece is marked with two numbers, one on each end. the pieces are symmetrical so that the two numbers are ...” in 📘 Mathematics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers