Multiplication principle - problems

  1. Seven
    post_1 Seven friends agree to send everyone a holiday card. How many postcards were sent?
  2. Dice
    dices2_4 We throw five times the dice. What is the probability that six fits exactly twice?
  3. Combinations 6
    dices2_3 6 purses 9 flaps 12 straps Every combination must include 1 purse, 1 flap and 1 strap. How many possible combinations?
  4. No. of divisors
    triangle_div How many different divisors has number ??
  5. 7 heroes
    7statocnych 5 heroes galloping on 5 horses behind. How many ways can sort them behind?
  6. Flags
    vlajka_cz How many different flags can be made from colors red, blue, green, white, yellow so that each flag consisted of three different colors?
  7. Vans
    shuttlevan In how many ways can 5 shuttle vans line up at the airport?
  8. Seating
    kupe_1 How many ways can 7 people sit on 2 numbered chairs (eg seat reservation on the train)?
  9. Guests
    hostia How many ways can 8 guests sit down on 10 seats standing in a row?
  10. 2nd class variations
    cards From how many elements you can create 6972 variations of the second class?
  11. Word
    words What is the probability that a random word composed of chars A, H, T, M will be MATH?
  12. Shelf
    bookshelf.JPG How many ways are there to arrange 6 books on a shelf?
  13. Phone numbers
    old_phone How many 7-digit telephone numbers can be compiled from the digits 0,1,2,..,8,9 that no digit is repeated?
  14. Rectangles
    rectangles How many rectangles with area 3002 cm2 whose sides is natural numbers are?
  15. Football league
    football In the 5th football league is 10 teams. How many ways can be filled first, second and third place?
  16. Playing cards
    playing_cards How many possible ways are to shuffle 9 playing cards?
  17. Pairs
    pair At the table sit 10 people, 5 on one side and 5 on the other side. Among them are 3 pairs. Every pair wants to sit opposite each other. How many ways can they sit?
  18. Morse alphabet
    morse_code Calculate how many words of Morse code to create compiling commas and dots in the words of one to four characters.
  19. Stacks
    euro_stacks Annie has a total of $ 702. The money must be divided into stacks so that each buyer has the same amounth of dollars. How many options she have?
  20. Candy
    bulls How many ways can divide 16 identical candies to 4 children?

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