# Combinatorial number + reason - math problems

#### Number of problems found: 57

• Salami
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?
• Competition
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?
• Pairs
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?
• Circles
How many different circles are determined by 9 points at the plane if 6 of them lie in a straight line?
• Cinema
How many ways can be divided 11 free tickets to the premiere of "Jáchyme throw it in the machine" between 6 pensioners?
• Chocolates
In the market we have 3 kinds of chocolates. How many ways can we buy 14 chocolates?
• Lines
In how many points will intersect 14 different lines, where no two are parallel?
• Hockey
The hockey match ended 8:2. How many different matches could be?
• Party
At the party everyone clink with everyone. Together, they clink 406 times. How many people were at the party?
• Family
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%.

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See also our combinations calculator. Combinatorial number - math problems. Reason - math problems.