Multiplication principle - examples

  1. Pins 2
    pin_keyboard how many different possible 4 digits pins can be found on the 10-digit keypad?
  2. Tricolors
    Flag_of_the_Netherlands.svg From the colors - red, blue, green, black and white, create all possible tricolors.
  3. Digits
    numbers2_18 How many natural numbers greater than 4000 which are formed from the numbers 0,1,3,7,9 with the figures not repeated, B) How many will the number of natural numbers less than 4000 and the numbers can be repeated?
  4. 7 heroes
    7statocnych 5 heroes galloping on 5 horses behind. How many ways can sort them behind?
  5. Vans
    shuttlevan In how many ways can 7 shuttle vans line up at the airport?
  6. Flags
    vlajka_cz How many different flags can be made from colors red, white, blue, black, yellow, green, purple, gray, orange so that each flag consisted of three different colors?
  7. Seating
    kupe_1 How many ways can 7 people sit on 3 numbered chairs (eg seat reservation on the train)?
  8. Football league
    football In the 2nd football league is 19 teams. How many ways can be filled first, second and third place?
  9. Guests
    hostia How many ways can 7 guests sit down on 9 seats standing in a row?
  10. Playing cards
    playing_cards How many possible ways are to shuffle 7 playing cards?
  11. Shelf
    bookshelf.JPG How many ways are there to arrange 9 books on a shelf?
  12. Medals
    medails In how many ways can be divided gold, silver and bronze medal among 18 contestant?
  13. Word
    words What is the probability that a random word composed of chars T, I, O, D, I will be IDIOT?
  14. Coin and die
    die Flip a coin and then roll a six-sided die. How many possible combinations are there?
  15. 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?
  16. 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?
  17. Area codes
    us_codes How many 6 digit area codes are possible if the first number can't be zero?
  18. 2nd class variations
    cards From how many elements you can create 6480 variations of the second class?
  19. Balls
    spheres From the urn in which are 18 white balls and 4 red, gradually drag 5-times without replacement. What is the probability that pulls balls are in order: red red white white white?
  20. Phone numbers
    old_phone How many 9-digit telephone numbers can be compiled from the digits 0,1,2,..,8,9 that no digit is repeated?

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