Combinatorics + reason - practice problems - page 10 of 19
Number of problems found: 378
- Boy-girl 6766
How many boy-girl pairs can we create from a class of 15 boys and 16 girls? - 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)?
- 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 - Significant 19983
We roll two dice, red and green. What probability will a more significant number fall on the red dice than on the green? - Numbers 7755
How many digits 7 are in numbers from 1 to 777? - Probability 17503
We choose four numbers from numbers 1 - 20. What probability will the numbers 6 or 10 be among them?
- Three-digit 11041
How many three-digit numbers can be composed of 0.5,9 digits? - Four-digit 82023
How many four-digit numbers are there in which there are at least three eights - Probability 81678
What is the probability of guessing a PIN code (4 numbers) if it contains only even numbers? - Probability 81446
What is the probability that each digit is different in a five-digit number? - Non-repeating 30101
1. How many different options are there for exchanging a ten-euro bill with one-euro, two-euro, and five-euro bills? a) 5 b) 8 c) 14 d) 10 2. How many non-repeating three-digit numbers can be written using odd digits? a) 999 b) 225 c) 60 d) 25
- Fruits
The shop sells four kinds of fruits. How many ways can we buy three pieces of fruit? - 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? - Page numbering
The book has 88 pages. How many times is the number 4 used for the book numbering? - Three subjects
In a class of 40 students, 18 passed mathematics, 19 passed accounting, 16 passed economics, five mathematics and accounting only, six mathematics only, nine accounting only, and two accounting and economics only. Each student was offered at least one of
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