Combinatorics - math word problems - page 33 of 51
Combinatorics is a part of mathematics that investigates the questions of existence, creation and enumeration (determining the number) of configurations.It deals with two basic tasks:
How many ways can we select certain objects
How many ways can we arrange certain objects
Number of problems found: 1005
- Ace or king
What is the probability that we will choose an ace or a king when choosing from a deck of sevens cards? - 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)! - 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? - Playing cards
How many possible ways are there to shuffle 8 playing cards? - 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 - Numbers 72404
How many numbers are less than 200, the digit sum of which is 6?
- Designated 64234
Marenka is required to read three books out of five designated books. How many ways can three books choose to be read? - Five-digit 13361
Write the 12 largest five-digit numbers in the twelve-position system and the 12 smallest six-digit numbers. - The spinner
The spinner below is spun 12 times. It landed on I 4 times, II 7 times, and III 1 time. What is the difference between the experimental and theoretical probabilities of landing on the II? - Competition 7328
Adam was practicing for a darts competition in class. Every day at home, he threw darts at a target in which the individual fields were worth 1,3 and 5 points. He threw 9 darts every day and always scored 27 points. He is in good form and never missed a t - Probability 3080
There are eight styles of graduation topics in the Slovak language. The Minister of Education draws 4 of them. What is the probability that he will choose at least one of the pairs?
- Combinations 6
Six purses Nine flaps 12 straps Every combination must include one purse, one flap, and one strap. How many are possible combinations? - Three dice
What is the probability that when we roll three dice, we roll the number 1,2,3? - Hearts
3 cards are chosen from a standard deck of 52 playing cards (13 hearts) with replacements. What is the probability of choosing 3 hearts in a row? - Air draft
The number 1,2,3,4,5 are written on five tickets on the table. Air draft randomly shuffled the tickets and composed a 5-digit number from them. What is the probability that he passed: and the largest possible number b, the smallest possible number c, a nu - Correctly 20713
Out of 30 tasks, Peter solved 24 correctly. Find success rate in percent.
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