# Combinatorics - examples

Would you like to compute count of combinations?- Rectangle

In rectangle with sides 10 and 9 mark the diagonal. What is the probability that a randomly selected point within the rectangle is closer to the diagonal than to any side of the rectangle? - 7 heroes

5 heroes galloping on 5 horses behind. How many ways can sort them behind? - No. of divisors

How many different divisors has number ?? - Flags

How many different flags can be made from colors white, yellow, red, blue, green, orange so that each flag consisted of three different colors? - Ace

From complete sets of playing cards (32 cards) we pulled out one card. What is the probability of pulling the ace? - Vans

In how many ways can 7 shuttle vans line up at the airport? - Seating

How many ways can 7 people sit on 3 numbered chairs (eg seat reservation on the train)? - Pediatrician

Pediatrician this month of 21 working days takes 3 days holidays. What is the probability that on Monday will be at work? - Bureau of Labor

Bureau of Labor is a state institution that provides mike and the rest for their so-called clients. The mission of the Bureau of Labor is spend taxpayer money to provide relaxation and benefits to those who do not want to work. Popularly speaking sense the - Guests

How many ways can 7 guests sit down on 9 seats standing in a row? - 2nd class variations

From how many elements you can create 6480 variations of the second class? - Word

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? - Shelf

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? - Chocolates

In the market have 3 kinds of chocolates. How many ways can we buy 13 chocolates? - Rectangles

How many rectangles with area 2832 cm^{2}whose sides is natural numbers are? - Two doctors

Doctor A will determine the correct diagnosis with a probability 80% and doctor B with a probability 72%. Calculate probability of correct diagnosis if patient is diagnosed by both doctors. - Dice

How many times must throw the dice, the probability of throwing at least one three was greater than 90%? - Football league

In the 2nd football league is 19 teams. How many ways can be filled first, second and third place? - Playing cards

How many possible ways are to shuffle 7 playing cards?

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