# Combinatorics - math problems

#### Number of problems found: 366

- 7 heroes

9 heroes galloping on 9 horses behind. How many ways can sort them behind? - Disco

On the disco goes 12 boys and 15 girls. In how many ways can we select four dancing couples? - Blocks

There are 9 interactive basic building blocks of an organization. How many two-blocks combinations are there? - Find the 2

Find the term independent of x in the expansion of (4x^{3}+1/2x)^{8} - Probability

What are the chances that in the lottery, in which the numbers are drawn 5 of 50, you win the first prize? - Combinations

How many different combinations of two-digit number divisible by 4 arises from the digits 3, 5 and 7? - Cars plates

How many different licence plates can country have, given that they use 3 letters followed by 3 digits? - Prize

How many ways can be rewarded 9 participants with the first, second, and third prizes in a sports competition? - Bits, bytes

Calculate how many different numbers can be encoded in 16-bit binary word? - Menu

On the menu are 12 kinds of meal. How many ways can we choose four different meals into the daily menu? - Cards

The player gets 8 cards of 32. What is the probability that it gets a) all 4 aces b) at least 1 ace - One three

We throw two dice. What is the probability that max one three falls? - Tournament

Six teams entered the basketball tournament. How many matches will be played if each team has to play one match with each other? - Olympics metals

In how many ways can be win six athletes medal positions in the Olympics? Metal color matters. - Vans

In how many ways can 9 shuttle vans line up at the airport? - Seating

How many ways can 6 people sit on 6 numbered chairs (e. g. , seat reservation on the train)? - Six on dice

What is the probability that when throwing two dice will fall at least one six? - Neighborhood

I have 7 cups: 1 2 3 4 5 6 7. How many opportunities of standings cups are there if 1 and 2 are always neighborhood? - Olympics

In how many ways can be placed 6 athletes on the podium at the Olympics? Depend on the color of the metal. - Combinations

How many elements can form six times more combinations fourth class than combination of the second class?

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