If 12 people are playing in a tournament and?

If 12 people are playing in a tournament and each person plays every other person, how many games will be played?

  1. 👍 0
  2. 👎 0
  3. 👁 325
  1. Mrs. Sue??

    1. 👍 0
    2. 👎 1
  2. Reiny

    1. 👍 0
    2. 👎 1
  3. The first person plays 11, the second plays 10, the thrid plays 9

    number games=11+10+9+...+1
    the sum of numbers from n-1 to 1, or
    number= N*(n-1)/2=12*11/2= 66

  4. number of subsets of 2 elements from a sample space of 12
    = C(12,2) = 66

    1. 👍 1
    2. 👎 0
    posted by Reiny
  5. n*(n-1)/2

    1. 👍 0
    2. 👎 0
    posted by aa
  6. 66 people. Just do 132 / 2.

    1. 👍 1
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    five friends plan a chess tournament. how many possible games can be played if each person plays with each other person exactly once.

    asked by jam on June 19, 2014
  2. math

    Six people enter a dart throwing tournament in which each person must play each of the others in the tournament exactly once. Determine the total number of games that will be played.

    asked by junie w. on November 14, 2013
  3. science

    1.What are the different ways in which we evaluate people?We evaluate people in a lot of different way. We look at a person on how they dress, if they don’t in a way we think they are suppose to dress then we look down on them.

    asked by tonya on July 29, 2008
  4. science

    1. What are the different ways in which we evaluate people? We evaluate people in a lot of different way. We look at a person on how they dress, if they don’t in a way we think they are suppose to dress then we look down on

    asked by mary on August 1, 2008
  5. math

    Inverse Variation I'm doing something wrong in my calculation but I can't figure out what -- The cost per person to rent a mountain cabin is inversely proportional to the number of people who share the rent. If the cost is $36 per

    asked by carly on November 24, 2019
  1. algebra

    This is a project called guess your card. there are 3 people playing and you. We are drawing only numbers from 1 to 9. Each person draws 3 cards and puts them on their foreheads facing out. 1 has a 1,3,7 next person has 3,4,7 and

    asked by Sean on December 4, 2011
  2. algebra 2

    A person playing a game of chance has a 0.25 probability of winning. If the person plays the game 20 times and wins half of that number of times, what is the difference between the theoretical probability and the experimental

    asked by ash on May 17, 2016
  3. math

    12 people are playing in a tennis comprtition.Each person must play one game against each other person.how many games are played altogether ? is it 12^11 divided by 2 = 66 thanks

    asked by wan on March 13, 2013
  4. English

    1. Take exercise on a regular basis, and you will be a happy person. 2. Earn a lot of money, and you will be a happy person. 3. Drive in the country, and you will be a happy person. 4. Play the violin, and you will be a happy

    asked by rfvv on April 18, 2014
  5. probablity

    Consider a group of n>=4 people, numbered from 1 to n. For each pair (i,j) with i!=j, person i and person j are friends, with probability p. Friendships are independent for different pairs. These n people are seated around a round

    asked by Anonymous on October 6, 2018

More Similar Questions