Combinatorics - math word problems - page 43 of 57
Number of problems found: 1135
- Prime number
Jan wrote any number from 1 to 20. What is the probability that he wrote the prime number? - Elements
If the number of elements is decreased by two, the number of permutations is decreased 30 times. How many elements are? - Dice Rolls for Sum
Stella rolls a standard six-sided die. How many times does she have to roll the die to be sure that the sum of the results will be at least 4? - Train colors
The locomotive pulls six wagons. Each of the wagons is either red or blue. The order of colors of individual wagons is the same from the front and back. How many such trains can you draw? - Football league
There are 16 teams in the football league. How many different sequences of results may occur at the end of the competition? - Two Digit Numbers Digits
How many two-digit numbers can be written using the number 0,2,6? We can also repeat the digits in the number. - Dice probability greater
What is the probability that the number a) greater than 4, b) Will the number greater than four fall on the dice roll? - Number divisibility
What is the probability of any two-digit natural number a) is divisible by seven, b) is divisible by nine, c) is not divisible by five. - Digit sum
How many are three-digit numbers that have a digit sum of 6? - VCP equation
Solve the following equation with variations, combinations, and permutations: 4 V(2,x)-3 C(2,x+ 1) - x P(2) = 0 - Combinations
If the number of elements increases by 3, it increases the number of combinations of the second class of these elements five times. How many are the elements? - Cinema seating ways
How many different ways can Millie, Peter, Joseph, and Renata sit next to each other in a cinema if Millie always sits in seat 1 and Peter always sits in seat 4? List all possibilities. - Seven segments display
Electronic devices sometimes use the type of digits below, where each digit uses some short stripes. For example, seven uses three small stripes. What is the largest three-digit number that you can make if you use twenty stripes? - The manufacturer
The manufacturer found that 3% of the plates produced had a malfunction. Of the complaint, 75% are first and 25% second. What is the probability of producing first and second-class plates? - Boys and girls
There are 20 boys and ten girls in the class. How many different dance pairs can we make of them? - Prize
How many ways can 9 participants be rewarded with the first, second, and third prizes in a sports competition? - Commitee
A class consists of 12 males and 15 females. How many committees of 6 are possible if the committee must consist of 4 males and 2 females? - Kids
How many different ways can sit 6 boys and 3 girls in line if girls want to sit on the edge? - 7 heroes
6 riders are galloping on 6 horses in single file. In how many ways can they be arranged in order? - Math logic
There are 20 children in the group. Every two children have a different name. Alena and John are among them. How many ways can we choose eight children to be among the selected A) was John B) was John and Alena C) at least one was Alena, John D) maximum o
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