Combinatorial number - high school - practice problems - page 13 of 14
Number of problems found: 276
- 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? - travel agency
A small travel agency offers five different tours on honeymoon. What is the probability that the bride and groom choose the same tour (they choose independently)?
- One green
In the container are 45 white and 15 green balls. We randomly select five balls. What is the probability that there will be one green ball maximally? - Intersection of the lines
How many points do nine lines intersect in a plane, of which four are parallel, and of the other five, no two are parallel (and if we assume that only two lines pass through each intersection)? - Balls
The urn is eight white and six black balls. We pull four random balls. What is the probability that among them will be two white? - 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?
- Fish tank
A fish tank at a pet store has 27 zebrafish. In how many different ways can George choose 2 zebra fish to buy? - Combinatorics
The city has 7 fountains. Works only 6. How many options are there that can squirt? - Circles
How many different circles are determined by 11 points at the plane if 7 of them lie in a straight line? - Trinity
How many different triads can be selected from group 38 students? - Weekly service
In the class are 20 pupils. How many opportunities has the teacher selected for two pupils who will have a week-class service randomly?
- MATES
In MATES (Small Television tipping), from 35 random numbers are drawn five winning numbers. How many possible combinations are there? - Cards
How many ways can you give away 32 playing cards to 7 player? - Cinema
How many ways can 11 free tickets to the premiere of "Jáchyme throw it in the machine" be divided between 6 pensioners? - Committees
How many different committees of 2 people can be formed from a class of 21 students? - Commitee
A class consists of 6 males and 7 females. How many committees of 7 are possible if the committee must consist of 2 males and 5 females?
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