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Twelve couples, who live in the Happy
Retirement Villa, decide to install intercom systems between each of their 12 suites. How many connecting lines are necessary to permit direct conversation between any suites?
(a) 2 couples
(b) 3 couples
(c) 4 couples
(d) 5 couples

Thank you

  • maths - ,

    I have no idea

  • maths - ,

    Your choices do not match the question. The answer should be in units of connecting lines, not in the number of couples.
    I suspect someone copied the problem incorrectly.

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