Variations - examples

See also our variations calculator.

  1. Six on dice
    dices2_1 What is the probability that when throwing two dice will fall at least one six?
  2. Sum on dice
    dices2 We have two dice. What is the greater likelihood of fall a total sum 7 or 8 ? (write 7, 8 or 0 if the probabilities are the same)?
  3. Sum or product
    dice_6 What is the probability that two dice fall will have the sum 7 or product 12?
  4. Lines
    lines_4 How many lines can be draw with 8 points, if three points lie on one line and the other any three points do not lie on the same line?
  5. Digits
    numbers_48 How many five-digit numbers can be written from numbers 0.3,4, 5, 7 that is divided by 10 and if digits can be repeated.
  6. 7 heroes
    7statocnych 5 heroes galloping on 5 horses behind. How many ways can sort them behind?
  7. No. of divisors
    triangle_div How many different divisors has number ??
  8. 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?
  9. Vans
    shuttlevan In how many ways can 7 shuttle vans line up at the airport?
  10. Seating
    kupe_1 How many ways can 7 people sit on 3 numbered chairs (eg seat reservation on the train)?
  11. Guests
    hostia How many ways can 7 guests sit down on 9 seats standing in a row?
  12. 2nd class variations
    cards From how many elements you can create 6480 variations of the second class?
  13. Football league
    football In the 2nd football league is 19 teams. How many ways can be filled first, second and third place?
  14. 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?
  15. Morse alphabet
    morse_code Calculate how many words of Morse code to create compiling commas and dots in the words of one to five characters.
  16. Coin and die
    die Flip a coin and then roll a six-sided die. How many possible combinations are there?
  17. Lock
    combination-lock Combination lock will open when the right choice of 5 numbers (from 1 to 12 inclusive) is selected. A. How many different lock combinations are possible? B. Is he combination lock named appropriately?
  18. Bits, bytes
    bits Calculate how many different numbers can be encoded in 16-bit binary word?
  19. Area codes
    us_codes How many 6 digit area codes are possible if the first number can't be zero?
  20. 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?

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