Combinatorial number - practice problems - page 3 of 15
Number of problems found: 292
- Combinations 16283
How many elements is it possible to form twice as many second-class combinations as a fourth-class combination? - Combinations 16213
From how many elements is it possible to create 120 second-class combinations? - Combinations 80637
If the number of elements decreases by 4, the number of combinations of the second class from these elements decreases three times. How many elements are there? - Different 68754
We have six balls of different colors. We select two balls at once. How many options? - Designated 64234
Marenka is required to read three books out of five designated books. How many ways can three books choose to be read? - Fruits
The shop sells four kinds of fruits. How many ways can we buy three pieces of fruit? - Cancel fractions
Compress the expression of factorial: (n+6)!/(n+4)!-n!/(n-2)! - Probability 73714
I roll six six-sided dice; what is the probability that exactly three threes will fall? - Probability 73054
We roll six dice. What is the probability that: a) a six falls twice b) six falls four times - Doesn't 37531
How many ways can you draw eight playing cards from 32 playing cards when their order doesn't matter? - Containers
One in eight containers is temporarily misplaced. A random sample of 12 containers is selected. What is the probability that 6 of these containers will be temporarily misplaced? - Seeds
The germination of seeds of a certain species of carrot is 96%. What is the probability that at least 25 seeds out of 30 will germinate? - Chocolates
In the market, we have 3 kinds of chocolates. How many ways can we buy 8 chocolates? - Chords
How many 4-tones chords (chord = at the same time sounding different tones) is possible to play within 7 tones? - Probability 17503
We choose four numbers from numbers 1 - 20. What probability will the numbers 6 or 10 be among them? - Possible 16243
There are 30 students in the class, three of whom will be tested. How many ways are possible if their order does not matter? - 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? - Subsets
How many 19 element subsets can be made from the 26 element set? - Combinatorics
The city has 7 fountains. Works only 6. How many options are there that can squirt?
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