Variations + combinatorial number - practice problems
Number of problems found: 52
- Combinations
Evaluate following expression involving combinations and permutations: C(6,3) + 3 P(6,3) - N-gon
How many diagonals have convex 30-gon? - Disco
At the disco goes 12 boys and 15 girls. In how many ways can we select four dancing couples? - Created 7758
How many words can be created from the word KLADIVO if we want the word VODA to be written next to each other? - Beads
How many ways can we thread four red, five blue, and six yellow beads onto a thread? - Combinatorics
The city has 7 fountains. Works only 6. How many options are there that can squirt? - Triangles 8306
Find out how many triangles you create from lines 7 dm, 5 dm, 10 dm, 12 dm, and 15 dm long. - Numbers 7755
How many digits 7 are in numbers from 1 to 777? - VCP equation
Solve the following equation with variations, combinations, and permutations: 4 V(2,x)-3 C(2,x+ 1) - x P(2) = 0 - A basket 4
A basket contains 9 fruits, where 4 are oranges, and the rest are mangoes. Three fruits are taken out one at a time and put aside. Find the probability that 3 are oranges. - There
There were 12 members on the commission. In the vote, five members were in favor, and seven members were against the proposal. In how many ways could it help the commission vote? - Five-digit numbers
How many different five-digit numbers can be created from the number 2,3,5 if the number 2 appears in the number twice and the number 5 also twice? - Tournament
Six teams entered the basketball tournament. How many matches will be played if each team has to play one match with the other? - Arithmetic 20153
The teacher has 12 examples from geometry and 15 examples from arithmetic. How many papers can he create if he wants three examples from geometry and five from arithmetic in the letter? - Together 3331
The group has 12 red girls and 25 blue girls in costumes. How many of them can we put together a group of 6 girls so that the four girls have red outfits? - Syrups
In the shop, they sell three types of syrups - apple, raspberry, and orange. How many ways can you buy four bottles of syrup? - Two groups
The group of 10 girls should be divided into two groups with at least four girls in each group. How many ways can this be done? - Seedbeds
The father wants to plant two seedbeds of carrot and two seedbeds of onion. Use a tree chart to find how many different options for placing the seedbeds he has. - Three-digit numbers
How many three-digit numbers are from the numbers 0 2 4 6 8 (with/without repetition)? - Divisions 4044
School players scored seven goals in the match. List all possible goal divisions into three-thirds and add up how many.
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