Combinatorics - math problems
Number of problems found: 366
- 7 heroes
9 heroes galloping on 9 horses behind. How many ways can sort them behind?
On the disco goes 12 boys and 15 girls. In how many ways can we select four dancing couples?
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 (4x3+1/2x)8
What are the chances that in the lottery, in which the numbers are drawn 5 of 50, you win the first prize?
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?
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?
On the menu are 12 kinds of meal. How many ways can we choose four different meals into the daily menu?
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?
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.
In how many ways can 9 shuttle vans line up at the airport?
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?
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?
In how many ways can be placed 6 athletes on the podium at the Olympics? Depend on the color of the metal.
How many elements can form six times more combinations fourth class than combination of the second class?
Would you like to compute count of combinations?