How many different ways can sit 8 boys and 3 girls in line, if girls want to sit on the edge?
Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):
Showing 0 comments:
Be the first to comment!
To solve this example are needed these knowledge from mathematics:
Next similar examples:
Combination lock will open when the right choice of 3 numbers (from 1 to 25 inclusive) is selected. A. How many different lock combinations are possible? B. Is he combination lock named appropriately?
- Football league
In the football league is 16 teams. How many different sequence of results may occur at the end of the competition?
How many different 7 digit natural numbers in which no digit is repeated, can be composed from digits 0,1,2,3,4,5,6?
In how many ways can 6 shuttle vans line up at the airport?
At the table sit 8 people, 4 on one side and 4 on the other side. Among them are 3 pairs. Every pair wants to sit opposite each other. How many ways can they sit?
- 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?
- Playing cards
How many possible ways are to shuffle 7 playing cards?
How many ways are there to arrange 6 books on a shelf?
How many ways can 5 guests sit down on 6 seats standing in a row?
- 7 heroes
9 heroes galloping on 9 horses behind. How many ways can sort them behind?
How many ways can select 4 fields on classic chess board with 64 fields, so that fields don't has the same color?
- PIN - codes
How many five-digit PIN - code can we create using the even numbers?
- Permutations without repetition
From how many elements we can create 720 permutations without repetition?
How many 3 letter "words" are possible using 14 letters of the alphabet? a) n - without repetition b) m - with repetition
- Phone numbers
How many 9-digit telephone numbers can be compiled from the digits 0,1,2,..,8,9 that no digit is repeated?
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?
- Theorem prove
We want to prove the sentense: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?