Combinatorial number + reason - practice problems - last page
Number of problems found: 112
- 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 the match have? - The confectionery
The confectionery sold five kinds of ice cream. How many ways can I buy three kinds if the order of ice cream does not matter? - The camp
At the end of the camp, a 8 friends exchanged addresses. Any friend gave their remaining 7 friends their card. How many addresses did they exchange?
- Pairs
Teachers must choose one pair of boys and girls from the five girls and four boys. A) How many such pairs of (M + F)? B) How many pairs were only boys (M + M)? C) How many are all possible pairs? - Circles
How many different circles are determined by 11 points at the plane if 7 of them lie in a straight line? - Cinema
How many ways can 11 free tickets to the premiere of "Jáchyme throw it in the machine" be divided between 6 pensioners? - Chocolates
In the market, we have 3 kinds of chocolates. How many ways can we buy 8 chocolates? - Lines
How many points will intersect 14 different lines where no two are parallel?
- Hockey
The hockey match ended 7:4. How many different matches could be? - Party
At the party, everyone clinked with everyone. Together, they clink $strng times. How many people were at the party? - Family
What is the probability that a family with 3 children has: exactly 1 girl? 2 girls and 1 boys? Consider the birth probability of a girl is 48.66% and a boy 51.34%.
We apologize, but in this category are not a lot of examples.
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