Combinatorics - practice problems - page 2 of 40
Number of problems found: 795
- Three digit from four digits
How many 3 digit numbers can you make using the digits 4,6,7 and 9?
- Four-digit 65124
Please find out how many different four-digit numbers we can create from the digits 3 and 8 so that the two digits three and two digits eight are used in each four-digit number created.
- Probability 64634
What probability does a randomly drawn two-digit number have the same digits? Write the result as a decimal number.
The father has six sons and ten identical, indistinguishable balls. How many ways can he give the balls to his sons if everyone gets at least one?
- Probability bullets
There are six red, five green, eight blue, 11 yellow balls in the bag. What is the probability that we will pull out the green bullet?
- Three-digit number
How many three-digit natural numbers can we form from the digits 0, 1, and 2 if the numerals can be repeated in these numbers?
- Combinations 63634
Jana has three blouses: red, blue, white and three skirts: blue, black, and brown. In how many days will all combinations of blouses and skirts change?
- Identical 63414
Jeníček has 4 identical yellow dice and 3 identical blue dice. How many different colored snakes can make them?
- According 63394
Three boys and four girls. How many ways can they be placed side by side according to gender?
- Six attractions
How many opportunities do you have if you want to complete ten rides on the fair, but there are only six attractions?
- School group
There are 5 girls and 7 boys in the group. They sit in a row next to each other. How many options if no two girls sit next to each other?
- Basketball 54361
The basketball team consists of five players. Determine how many options his coach has to build a team if he has 12 players?
- Right key
The hostel has 4 rooms. The keys to each room are not numbered. Each of the four guests took one key. What is the probability that everyone took the right key?
- Probability 49301
Eva, together with another 199 nines, took part in job interviews at the Dream School, which accepts only the 120 most successful. What is the probability of its acceptance?
- In PE
In PE, students play a game where they do different exercises depending on the color of marble that Coach Forbes draws. Coach Forbes has a jar with 6 red marbles, 12 blue marbles, 16 purple marbles, 2 green marbles, and 4 yellow marbles. What is the proba
- Different 48243
He has four types of pants. How many T-shirts does he have if he can dress 40 different ways?
- A box
A box contains 6 red balls, 5 blue, and 4 white balls. Find the probability of drawing a) red ball b) non-white ball.
- ID tag
How many 3 digit ID tag can be made if: a) a digit cannot be used more than once b) the 1st digit must be five, and repetition of the others is not permitted.
In how many ways could 9 participants of the school round of five-in-a-row win the first three places?
- Double six-six
What is the probability, that a player in the games of ludo will throw a double 6 twice .
Would you like to compute the count of combinations?