# Factorial - 8th grade (13y) - examples

1. Guests
How many ways can 5 guests sit down on 6 seats standing in a row?
2. Shelf
How many ways are there to arrange 6 books on a shelf?
3. Playing cards
How many possible ways are to shuffle 7 playing cards?
4. Kids
How many different ways can sit 8 boys and 3 girls in line, if girls want to sit on the edge?
5. 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?
6. 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?
7. Tournament
Determine how many ways can be chosen two representatives from 34 students to school tournament.
8. Words
How many 3 letter "words" are possible using 14 letters of the alphabet? a) n - without repetition b) m - with repetition
9. Olympics
In how many ways can be placed 6 athletes on the podium at the Olympics? Depend on the color of the metal.
10. MATES
In MATES (Small Television tipping) from 35 randomly numbers drawn 5 winning numbers. How many possible combinations there is?
11. Football league
In the football league is 16 teams. How many different sequence of results may occur at the end of the competition?
12. Combinations of sweaters
I have 4 sweaters two are white, 1 red and 1 green. How many ways can this done?
13. Lunch
Seven classmates go every day for lunch. If they always come to the front in a different order, will be enough school year to take of all the possibilities?
14. Desks
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
15. Practice
How many ways can you place 20 pupils in a row when starting on practice?

Do you have an interesting mathematical example that you can't solve it? Enter it, and we can try to solve it.

To this e-mail address, we will reply solution; solved examples are also published here. Please enter e-mail correctly and check whether you don't have a full mailbox.