Each with each

Five pupils from 3A class played table tennis. How many matches did they play with each other?

Correct answer:

n =  10

Step-by-step explanation:

z=5 n=z (z1)2=5 (51)2=10



We will be pleased if You send us any improvements to this math problem. Thank you!



avatar




Tips to related online calculators
Would you like to compute count of combinations?

 
We encourage you to watch this tutorial video on this math problem: video1

Related math problems and questions:

  • Tournament
    futball_ball How many matches will be played in a football tournament in which there are two groups of 5 teams if one match is played in groups with each other and the group winners play a match for the overall winner of the tournament?
  • Tournament
    zapisnik_2 Six teams entered the basketball tournament. How many matches will be played if each team has to play one match with each other?
  • Class alphabet
    kniha_tridni All 29 pupils in the class are written in a class by alphabet. The number of pupils enrolled before Paul is three times higher than the number of pupils behind him. Calculate how many pupils are enrolled after Paul.
  • Research in school
    numbers_1 For particular research in high school, four pupils are to be selected from a class with 30 pupils. Calculate the number of all possible results of the select and further calculate the number of all possible results, if it depends on the order in which th
  • Ten persons
    TUCWGKGHCVGBPEMEP75TVAR5LA Ten persons, each person makes a hand to each person. How many hands were given?
  • Games
    chess Jack and Paul decided to play chess against each other. They bet ten pesos on each game they played. Jack won three bets and Paul won fifty pesos. How many games did they play?
  • Weekly service
    school_table.JPG In the class are 20 pupils. How many opportunities have the teacher selected two pupils who will have a week-class service randomly?
  • Hockey
    hokej The hockey match ended 8:2. How many different matches could be?
  • Unknown number 16
    numbers_35 My number's tens is three times more then ones My number's ones is twice the number of thousands and my number's hundreds is half the number of of tens. I have two ones. which number am I?
  • Table 3x3
    3x3 Table with numbers 3x3 in the first row 66,24,33 in the second row 57,? 19 in the third row 18,45,60 What number comes ar mark ?. Maybe the numbers: 22,46,45,47
  • Honored students
    metals Of the 25 students in the class, 10 are honored. How many ways can we choose 5 students from them, if there are to be exactly two honors between them?
  • Rings - intersect
    venn_1 There are 15 pupils on the sporting ring. 10 pupils go to football, 8 pupils go to floorball. How many pupils go to both rings at the same time?
  • Pupils 7
    skola_4 There are 40 pupils in a certain class. 3/5 of the class are boys. How many are girls?
  • Clubhouse
    stol_2 There were only chairs and table in the clubhouse. Each chair had four legs, and the table was triple. Scouts came to the clubhouse. Everyone sat on their chair, two chairs were left unoccupied, and the number of legs in the room was 101. How many chairs
  • Unknown number
    numbers_27 I think the number: Its half is 16 bigger than his quarter. I think the number N . ..
  • Training
    tenis The table contains tennis training schedule for Saturday's younger students during the winter indoor season. Before the start of the summer season is preparing a new training schedule. Tomas Kucera will be able to practice only in the morning, sisters Kov
  • N-gon
    ngon How many diagonals has convex 11-gon?