Factorial - examples

  1. Vans
    shuttlevan In how many ways can 7 shuttle vans line up at the airport?
  2. Seating
    kupe_1 How many ways can 7 people sit on 3 numbered chairs (eg seat reservation on the train)?
  3. Guests
    hostia How many ways can 7 guests sit down on 9 seats standing in a row?
  4. Word
    words What is the probability that a random word composed of chars T, I, O, D, I will be IDIOT?
  5. Shelf
    bookshelf.JPG How many ways are there to arrange 9 books on a shelf?
  6. Playing cards
    playing_cards How many possible ways are to shuffle 7 playing cards?
  7. Pairs
    pair At the table sit 12 people, 6 on one side and 6 on the other side. Among them are 5 pairs. Every pair wants to sit opposite each other. How many ways can they sit?
  8. Candy
    bulls How many ways can divide 22 identical candies to 4 children?
  9. Kids
    kids How many different ways can sit 5 boys and 5 girls in line, if girls want to sit on the edge?
  10. 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?
  11. School trip
    hostel_1 Class has 21 students. What different ways students can be accommodated in the hostel, where available 2× 2-bed, 3× 3-bed and 2× 4-bed rooms. (Each room has its own unique number)
  12. Numbers
    numbers_3 How many different 4 digit natural numbers in which no digit is repeated, can be composed from digits 0,1,2,3?
  13. Combi-triangle
    komb_triangle On each side of the square is marked 2 different points outside the vertices of the square. How many triangles can be constructed from this set of points, where each vertex of the triangle lie on the other side of the square?
  14. Elections
    gaspar_billboard In elections candidate 8 political parties. Calculate how many possible ways can the elections finish, if any two parties will not get the same number of votes.
  15. Hockey players
    players After we cycle five hockey players sit down. What is the probability that the two best scorers of this crew will sit next to each other?
  16. Tournament
    turnaj Determine how many ways can be chosen four representatives from 27 students to school tournament.
  17. Words
    words How many 3 letter "words" are possible using 18 letters of the alphabet? a) n - without repetition b) m - with repetition
  18. Seating rules
    school_class In a class are 22 seats but in 2.B class are only 14 students. How many ways can student seat? (The class has 11 benches. A bench is for a pair of students.) Result (large number) logarithm and thus write down as powers of 10.
  19. Friends in cinema
    cinema_1 5 friends went to the cinema. How many possible ways can sit in a row, if one of them wants to sit in the middle and the remaining's place does not matter?
  20. Cinema
    stale_kvoka How many ways can be divided 13 free tickets to the premiere of "Jáchyme throw it in the machine" between 10 pensioners?

Do you have interesting mathematical example that you can't solve it? Enter it and we can try to solve it.



To this e-mail address we will reply solution; solved examples are also published here. Please enter e-mail correctly and check whether you don't have a full mailbox.