Combinatorial number - math word problems

Number of problems found: 128

  • Combinations
    kvadrat_3 If the number of elements increase by 3, it increases the number of combinations of the second class of these elements 5 times. How many are the elements?
  • Calculation of CN
    color_combinations Calculate: ?
  • Count of triangles
    SquareTriangle Given a square ABCD and on each side 8 internal points. Determine the number of triangles with vertices at these points.
  • Research in school
    numbers_1 For particular research in high school, four pupils are to be selected from a class with 30 pupils. Calculate the number of all possible results of the select and further calculate the number of all possible results, if it depends on the order in which th
  • Trinity
    trojka How many different triads can be selected from group 38 students?
  • Families 2
    family_24 Seven hundred twenty-nine families are having six children each. The probability of a girl is 1/3, and the probability of a boy is 2/3. Find the number of families having two girls and four boys.
  • Three numbers
    dices2_9 We have three different non-zero digits. We will create all 3 digits numbers from them to use all 3 figures in each number. We add all the created numbers, and we get the sum of 1554. What were the numbers?
  • Divide
    hrusky How many different ways can three people divide 7 pears and 5 apples?
  • Hockey
    hokej Hockey match ended 8:2. How many different matches could be?
  • Examination
    examination The class is 21 students. How many ways can choose two to examination?
  • Teams
    football_team How many ways can divide 16 players into two teams of 8 member?
  • A pizza
    pizza_11 A pizza place offers 14 different toppings. How many different three topping pizzas can you order?
  • N-gon
    ngon How many diagonals has convex 11-gon?
  • Diagonals
    diagonals_1 What x-gon has 54 diagonals?
  • Combinations
    math_2 From how many elements we can create 990 combinations 2nd class without repeating?
  • Combinatorics
    fontains The city has 7 fountains. Works only 6. How many options are there that can squirt ?
  • Committees
    globe How many different committees of 2 people can be formed from a class of 21 students?
  • 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

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