Combinatorics - math word problems - page 42 of 54
Number of problems found: 1080
- 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? - 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 - Permutations 6450
Seven times the permutations of n elements equal one-eighth of the permutations of n + 2 elements. What is the number of elements? - Different 82447
How many 4 colored flags can be made from 5 colors so that each flag consists of three different colors? - Determine 80084
Determine the number of all natural numbers greater than 2000 in which the digits 1, 2, 4, 6, and 8 occur at most once each. - Themselves 33561
How many ways can a 6-member football club member choose a leader and captain from among themselves? - Big numbers
How many natural numbers less than 10 to the sixth can be written in numbers: a) 9.8.7 b) 9.8.0 - Practice
How many ways can you place 20 pupils in a row when starting on practice? - Dice
How many times must you throw the dice, and was the probability of throwing at least one pětky greater than 70%? - Stella 83799
Stella rolls a die from 1 to 6. How many times does she have to roll the die to be sure that the sum will be 4? - Volleyball 7827
In the volleyball tournament, three teams and four foreign teams played, each with each other, in one match without revenge. How many games have been played? - A bag
A bag contains nine blue marbles and one green marble. What is the probability of drawing a blue marble followed by a green marble without replacing the first marble before drawing the second marble? - Year 2020
The four-digit number divided by 2020 gives a result of 1, **. (Can not be in form 1,*0. ) Write all the options. - 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? - Conditional 73664
I roll a 7-wall dice. What is the conditional probability that three fell if an odd number fell? - Round table
Find the number of ways in which eight people can be seated at a round table such that 2 of them always sit together. - Boys and girls
There are 20 boys and ten girls in the class. How many different dance pairs can we make of them? - Medicine
We test medicine on six patients. For all, the drug doesn't work. If the drug success rate of 20%, what is the probability that medicine does not work? - 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?
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