Combinatorics - math problems

Number of problems found: 366

  • 7 heroes
    7statocnych 9 heroes galloping on 9 horses behind. How many ways can sort them behind?
  • Disco
    vencek On the disco goes 12 boys and 15 girls. In how many ways can we select four dancing couples?
  • Blocks
    cubes3_1 There are 9 interactive basic building blocks of an organization. How many two-blocks combinations are there?
  • Find the 2
    square_4 Find the term independent of x in the expansion of (4x3+1/2x)8
  • Probability
    loto What are the chances that in the lottery, in which the numbers are drawn 5 of 50, you win the first prize?
  • Combinations
    circles How many different combinations of two-digit number divisible by 4 arises from the digits 3, 5 and 7?
  • Cars plates
    car_plate How many different licence plates can country have, given that they use 3 letters followed by 3 digits?
  • Prize
    metals_1 How many ways can be rewarded 9 participants with the first, second, and third prizes in a sports competition?
  • Bits, bytes
    bits Calculate how many different numbers can be encoded in 16-bit binary word?
  • Menu
    jedalnicek On the menu are 12 kinds of meal. How many ways can we choose four different meals into the daily menu?
  • Cards
    cards_4 The player gets 8 cards of 32. What is the probability that it gets a) all 4 aces b) at least 1 ace
  • One three
    dice We throw two dice. What is the probability that max one three falls?
  • Tournament
    zapisnik_2 Six teams entered the basketball tournament. How many matches will be played if each team has to play one match with each other?
  • Olympics metals
    olympics In how many ways can be win six athletes medal positions in the Olympics? Metal color matters.
  • Vans
    shuttlevan In how many ways can 9 shuttle vans line up at the airport?
  • Seating
    kupe_1 How many ways can 6 people sit on 6 numbered chairs (e. g. , seat reservation on the train)?
  • Six on dice
    dices2_1 What is the probability that when throwing two dice will fall at least one six?
  • Neighborhood
    glasses_1 I have 7 cups: 1 2 3 4 5 6 7. How many opportunities of standings cups are there if 1 and 2 are always neighborhood?
  • Olympics
    olimpiada-medaliile In how many ways can be placed 6 athletes on the podium at the Olympics? Depend on the color of the metal.
  • Combinations
    trezor_1 How many elements can form six times more combinations fourth class than combination of the second class?

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