Combinatorics - practice problems
Number of problems found: 766
- Menu choice
In a Jollibee, you have a menu choice of C1, C2, and C3. For a dessert, you have a choice of ice-cream and mango peach. How many different options do you have?
- 20 balls
20 coloured balls in a bag 4 red 7 green 9 yellow What is the probability of picking a yellow ball?
- Four-digit 73114
How many four-digit numbers can we assemble from the digits 2, 6, 3, 5, 1, and 9 if the numerals in the number cannot be repeated?
- T-shirts 73074
Dušan has 8 T-shirts and three pairs of shorts in his closet. How many ways can he dress for school?
- Probability 71784
What is the probability that if you roll the dice twice, the sum of 12 will fall?
- Three-digit 71724
Use the product rule to find out how many three-digit numbers exist.
- Including 70264
A group of six, including at least three women, is selected from seven men and four women. Find how many ways we can do this.
- Competition 69474
There are ten girls and seven boys in the dance group. Only one mixed couple is to go to the competition. How many are all possible pairs from which we can choose a pair for the competition?
- Five-a-side 69434
Five children took part in the five-a-side tournament: Anka, Betka, Celeste, Dano, and Erik. Everyone played with everyone. How many games have been played?
- Three-member 69274
The teacher wants to create one three-member team of four girls and four boys, in which there will be one girl and two boys. How many different options does it have to create a team?
- Different 68754
We have six balls of different colors. We select two balls at once. How many options?
- Raspberries 66824
Klára wants to make a fruit cocktail from three types of fruit. It has pineapple, pears, bananas, raspberries, and cherries. How many different cocktails can he create?
- Designated 66594
Marenka is required to read three books out of five designated books. How many ways can three books choose to be read?
- (2 66504
K (2, 8) + K (3, 4) =
- 6 married
6 married couples are in a room, if 2 people are chosen at random. Find the probability that; a). they are married. b). one is male and one is female.
- Different 65654
Jane received three different marks (1-5) during the day. How many marks did she receive? A) 6 B) 8 C) 10 D) 12
- 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.
- Indistinguishable 64624
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?
Would you like to compute the count of combinations?