# Combinatorial number - examples

- Blocks

There are 9 interactive basic building blocks of an organization. How many two-blocks combinations are there? - Diagonals

What x-gon has 54 diagonals? - Three students

Three students independently try to solve the problem. The first student will solve a similar problem with a probability of 0.6, the second student will solve at a probability of 0.55, and the third will solve at a probability 0.04. The problem is resolved - Dice

We throw 10 times a play dice, what is the probability that the six will fall exactly 4 times? - Bridge cards

How many bridge hands are possible containing 4 spades,6 diamonds, 1 club, and 2 hearts? - Cancel fractions

Compress the expression of factorial: (n+6)!/(n+4)!-n!/(n-2)! - Word

What is the probability that a random word composed of chars H, T, M, A will be MATH? - Chocolates

In the market have 4 kinds of chocolates. How many ways can we buy 23 chocolates? - Rectangles

How many rectangles with area 3002 cm^{2}whose sides is natural numbers are? - Sales

From statistics of sales goods, item A buy 51% of people and item B buys 59% of people. What is the probability that from 10 people buy 2 item A and 8 item B? - Candy

How many ways can divide 16 identical candies to 4 children? - Stacks

Annie has a total of $ 702. The money must be divided into stacks so that each buyer has the same amounth of dollars. How many options she have? - N-gon

How many diagonals has convex 14-gon? - Pairs

From the five girls and four boys teachers have to choose one pair of boy and girl. A) How many such pairs of (M + F)? B) How many pairs where only boys (M + M)? C) How many are all possible pairs? - Party

At party overyone clink with everyone. Together, they clink 171 times. How many people were at the party? - 2nd class combinations

From how many elements you can create 4560 combinations of the second class? - Lines

In how many points will intersect 14 different lines, where no two are parallel? - Commitee

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? - Family

What is the probability that a family with 7 childrens have: exactly 5 girls? 7 girls and 0 boys? Consider the birth probability of a girl is 48.69% and boy 51.31%. - Bulbs

The probability that the bulb can operate 5000 hours is 0.16. What is the probability that exactly one of three bulbs can operate 5000 hours?

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