Variations + reason - practice problems
Number of problems found: 126
- Five couples
In how many ways can 5 couples arrange themselves in a row if they stay together? - Seven
Seven friends agreed to send everyone a holiday card. How many postcards were sent? - Six on dice
When throwing two dice, what is the probability they will fall at least one six? - Four-digit 82023
How many four-digit numbers are there in which there are at least three eights - Variations 3rd class
From how many elements can we create 13,800 variations of the 3rd class without repeating? - Chocolates
How many ways can we distribute eight different chocolates to four children? - Groups 72194
I have eight groups. How could they place first, second, and third? - Probability 59073
A group of n people, including Jano and Fero, randomly line up. What probability will there be exactly r people (r - Numbers 7755
How many digits 7 are in numbers from 1 to 777? - Five number code
I have a five-digit code on the bag that I forgot. I remember that it was a symmetric number and the sum of its digits was 22. Write all the numbers that can be a code. - Gold, silver, bronze
How many ways can we divide gold, silver, and bronze medals if six people compete? - Word MATEMATIKA
How many words can be created from the phrase MATEMATIKA by changing the letters' order, regardless of whether the words are meaningful? - Chess
How many different ways can you initiate a game of chess (first pass)? - Five-digit 66894
Create all five-digit numbers in ascending order from three, four, and two zeros. - Two-digit 5457
From how many digits can we create twenty-two-digit numbers in which the digits do not repeat? - Number 4
Kamila wrote all-natural numbers from 1 to 400 inclusive. How many times did she write the number 4? - One three
We throw two dice. What is the probability that number three falls maximally once? - Tricolors
From the colors - red, blue, green, black, and white, create all possible tricolors. - Variations 70724
If we increase the number of elements by 2, the number of variations of the second class without repetition increases by 22. How many elements do we have initially? - Probability 68564
What is the probability that the number a) greater than 4, b) Will the number greater than four fall on the dice roll?
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