Combinatorial number - examplesSee also our combinations calculator.
- First class
The shipment contains 40 items. 36 are first grade, 4 are defective. How many ways can select 5 items, so that it is no more than one defective?
From a set of 32 cards we randomly pull out three cards. What is the probability that it will be seven king and ace?
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?
What is the probability that a random word composed of chars T, I, O, D, I will be IDIOT?
The class is 22 students. How many ways can choose four to examination?
Determine how many ways can be chosen four representatives from 27 students to school tournament.
- Weekly service
In the class are 16 pupils. How many opportunities have the teacher if he wants choose two pupils randomly who will weeklies?
In the market have 3 kinds of chocolates. How many ways can we buy 13 chocolates?
How many different triads can be selected from the group 29 students?
How many ways can divide 12 players into two teams of 6 member?
How many diagonals has convex 29-gon?
How many different committees of 2 people can be formed from a class of 29 students?
How many 6-tones chords (chord = at the same time sounding different tones) is possible to play within 10 tones?
- Fish tank
A fish tank at a pet store has 10 zebra fish. In how many different ways can George choose 4 zebra fish to buy?
A class consists of 5 males and 18 females. How many committees of 4 are possible if the committee must consist of 3 males and 1 females?
- Calculation of CN
How many ways can divide 22 identical candies to 4 children?
In MATES (Small Television tipping) from 35 randomly numbers drawn 5 winning numbers. How many possible combinations there is?
Hockey match ended 5:10. How many different matches could be?
In how many points will intersect 11 different lines, where no two are parallel?