Combinatorial number + reason - math problems
Number of problems found: 57
How many ways can we choose 5 pcs of salami if we have 6 types of salami for 10 pieces and one type for 4 pieces?
- Points in plane
The plane is given 12 points, 5 of which are located on a straight line. How many different lines could be drawn from these points?
15 boys and 10 girls are in the class. On school competition of them is selected 6-member team composed of 4 boys and 2 girls. How many ways can we select students?
- Combinations of sweaters
I have 4 sweaters two are white, 1 red and 1 green. How many ways can this done?
- Hockey game
In the hockey game was made six goals. Czech played against Finland. Czechs won 4:2. In what order to fall goals? How many game sequences were possible during the game?
- Three-digit numbers
How many three-digit numbers are from the numbers 0 2 4 6 8 (with/without repetition)?
- Hockey match
The hockey match ended with a result of 3:1. How many different storylines may have the match?
- The confectionery
The confectionery sold 5 kinds of ice cream. In how many ways can I buy 3 kinds if order of ice creams does not matter?
- The camp
At the end of the camp a 8 friends exchanged addresses. Any friend gave remaining 7 friends his card. How many addresses they exchanged?
From the five girls and four boys teachers have to choose one pair of boy and girl. A) How many such pairs of (M + F)? B) How many pairs where only boys (M + M)? C) How many are all possible pairs?
How many different circles are determined by 9 points at the plane if 6 of them lie in a straight line?
How many ways can be divided 11 free tickets to the premiere of "Jáchyme throw it in the machine" between 6 pensioners?
In the market we have 3 kinds of chocolates. How many ways can we buy 14 chocolates?
In how many points will intersect 14 different lines, where no two are parallel?
The hockey match ended 8:2. How many different matches could be?
At the party everyone clink with everyone. Together, they clink 406 times. How many people were at the party?
What is the probability that a family with 7 childrens have: exactly 6 dívek? 2 dívky and 5 boys? Consider the birth probability of a girl is 48.87% and boy 51.13%.
See also our combinations calculator. Combinatorial number - math problems. Reason - math problems.