Factorial - examples
If the number of elements is decreased by two the number of permutations is decreased 30 times. How many elements are?
In how many ways can 7 shuttle vans line up at the airport?
How many ways can 7 people sit on 3 numbered chairs (eg seat reservation on the train)?
How many ways can 7 guests sit down on 9 seats standing in a row?
- Playing cards
How many possible ways are to shuffle 7 playing cards?
How many ways are there to arrange 9 books on a shelf?
In elections candidate 8 political parties. Calculate how many possible ways can the elections finish, if any two parties will not get the same number of votes.
What is the probability that a random word composed of chars T, I, O, D, I will be IDIOT?
Determine how many ways can be chosen four representatives from 27 students to school tournament.
How many different 4 digit natural numbers in which no digit is repeated, can be composed from digits 0,1,2,3?
How many different committees of 2 people can be formed from a class of 29 students?
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?
- Friends in cinema
5 friends went to the cinema. How many possible ways can sit in a row, if one of them wants to sit in the middle and the remaining's place does not matter?
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?
How many 3 letter "words" are possible using 18 letters of the alphabet? a) n - without repetition b) m - with repetition
In how many ways can be placed 6 athletes on the podium at the Olympics? Depend on the color of the metal.
Francisco got birthday 4 colour pens in different colors. How many ways he can give them side by side in pencil?
How many ways can give away 32 playing cards to 3 player?
How many ways can be divided 13 free tickets to the premiere of "Jáchyme throw it in the machine" between 10 pensioners?