Permutations - examplesSee also our permutations calculator.
A class has 20 students. The classroom consists of 20 desks, with 4 desks in each of 5 different rows. Amy, Bob, Chloe, and David are all friends, and would like to sit in the same row. How many possible seating arrangements are there such that Amy, Bob, C
- Word MATEMATIKA
How many words can be created from the word MATEMATIKA by changing the order of the letters, regardless of whether or not the words are meaningful?
- 7 heroes
5 heroes galloping on 5 horses behind. How many ways can sort them behind?
How many different flags can be made from colors white, yellow, red, blue, green, orange so that each flag consisted of three different colors?
In how many ways can 7 shuttle vans line up at the airport?
What is the probability that a random word composed of chars T, D, O, O, V, S, B, A, P, P, D, N, R, O, Ě will be PRAVDĚPODOBNOST?
How many ways are there to arrange 9 books on a shelf?
- Phone numbers
How many 9-digit telephone numbers can be compiled from the digits 0,1,2,..,8,9 that no digit is repeated?
How many rectangles with area 2832 cm2 whose sides is natural numbers are?
- Playing cards
How many possible ways are to shuffle 7 playing cards?
At the table sit 12 people, 6 on one side and 6 on the other side. Among them are 5 pairs. Every pair wants to sit opposite each other. How many ways can they sit?
Combination lock will open when the right choice of 4 numbers (from 1 to 14 inclusive) is selected. A. How many different lock combinations are possible? B. Is he combination lock named appropriately?
How many different ways can sit 5 boys and 5 girls in line, if girls want to sit on the edge?
- School trip
Class has 21 students. What different ways students can be accommodated in the hostel, where available 2× 2-bed, 3× 3-bed and 2× 4-bed rooms. (Each room has its own unique number)
How many different 4 digit natural numbers in which no digit is repeated, can be composed from digits 0,1,2,3?
3 children pulled 9 different toys from a box. Many ways can be divided toys so that each children had at least one toy?
- Hockey players
After we cycle five hockey players sit down. What is the probability that the two best scorers of this crew will sit next to each other?
How many ways can select 3 fields on classic chess board with 64 fields, so that fields don't has the same color?
The voltage station is every day changing the master password, which consists of three letters. Code generation process does not change and is based on the following procedure: The following letters (A) to (I) correspond to different numbers from 1 to 9. I
- Logik game
Letter game Logik is a two player game, which has the following rules: 1. The first player thinks five-letter word in which no letter is not repeated. 2. The second player writes a five-letter word. 3. The first player answers two numbers - the first numbe