# Combinatorics - math problems

#### Number of problems found: 366

- Combinatorics

The city has 7 fountains. Works only 6. How many options are there that can squirt ? - Variation equation

Solve combinatorics equation: V(2, x+8)=72 . .. variations second class from x+8 items - Calculation of CN

Calculate: ? - Trinity

How many different triads can be selected from group 38 students? - Seven

Seven friends agree to send everyone a holiday card. How many postcards were sent? - Medals

In how many ways can be divided gold, silver, and bronze medal among 21 contestants? - Pins 2

how many different possible 4 digits pins can be found on the 10-digit keypad? - PIN - codes

How many five-digit PIN - code can we create using the even numbers? - Hockey

The hockey match ended 8:2. How many different matches could be? - Examination

The class is 21 students. How many ways can choose two to examination? - Teams

How many ways can divide 16 players into two teams of 8 member? - Task of the year

Determine the number of integers from 1 to 10^{6}with ending four digits 2015. - A pizza

A pizza place offers 14 different toppings. How many different three topping pizzas can you order? - How many 2

How many three lettered words can be formed from letters A B C D E G H if repeats are: a) not allowed b) allowed - N-gon

How many diagonals has convex 11-gon? - Possible combinations - word

How many ways can the letters F, A, I, R be arranged? - Diagonals

What x-gon has 54 diagonals? - First man

What is the likelihood of a random event where are five men and seven women first will leave the man? - Combinations

From how many elements we can create 990 combinations 2nd class without repeating? - Committees

How many different committees of 2 people can be formed from a class of 21 students?

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