Combinatorial number - examples

See also our combinations calculator.

  1. Word
    words What is the probability that a random word composed of chars T, I, O, D, I will be IDIOT?
  2. Examination
    examination The class is 22 students. How many ways can choose four to examination?
  3. Tournament
    turnaj Determine how many ways can be chosen four representatives from 27 students to school tournament.
  4. Weekly service
    school_table.JPG In the class are 16 pupils. How many opportunities have the teacher if he wants choose two pupils randomly who will weeklies?
  5. Chocolates
    Chocolate In the market have 3 kinds of chocolates. How many ways can we buy 13 chocolates?
  6. Trinity
    trojka How many different triads can be selected from the group 29 students?
  7. Teams
    football_team How many ways can divide 12 players into two teams of 6 member?
  8. N-gon
    ngon How many diagonals has convex 29-gon?
  9. Committees
    globe How many different committees of 2 people can be formed from a class of 29 students?
  10. Chords
    chords How many 6-tones chords (chord = at the same time sounding different tones) is possible to play within 10 tones?
  11. Fish tank
    zebra_fish A fish tank at a pet store has 10 zebra fish. In how many different ways can George choose 4 zebra fish to buy?
  12. Commitee
    committees A class consists of 5 males and 18 females. How many committees of 4 are possible if the committee must consist of 3 males and 1 females?
  13. Candy
    bulls How many ways can divide 22 identical candies to 4 children?
  14. Calculation of CN
    color_combinations Calculate: ?
  15. MATES
    sazka In MATES (Small Television tipping) from 35 randomly numbers drawn 5 winning numbers. How many possible combinations there is?
  16. Hockey
    hokej Hockey match ended 5:10. How many different matches could be?
  17. Lines
    lines_1 In how many points will intersect 11 different lines, where no two are parallel?
  18. 2nd class combinations
    color_circle From how many elements you can create 1081 combinations of the second class?
  19. Party
    party-informatikov At party overyone clink with everyone. Together, they clink 406 times. How many people were at the party?
  20. Rectangles
    rectangles How many rectangles with area 2832 cm2 whose sides is natural numbers are?

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