153 Answered Questions for the topic Combinations

Combinations Math Knowledge Check


You rent 4 movies. All are different categories. How many orders can you watch them in?

There are friends over and you rent 4 movies. One comedy, one animated, one action and one science fiction. How many orders can you watch the movies in? 

Please Help me to answer this question. Justify your answer please

A student council has five seniors, four juniors, three sophomores, and two freshmen as members. In how many ways can a four member council committee be formed that includes one member of each class?
Combinations Variables


How many combinations of 3 variables are possible when single variables can't be repeated

This is a bit of a strange and specific question, but I've been putting a lot of thought into this problem and can only find 8 totally unique combinations, while I thought there'd be 9. I hope I... more

Your iPad has a 4 digit passcode. How many different passcodes are possible, if the digits can repeat?

 I got 210 but my teacher said that was incorrect. What am I doing wrong?
Combinations Math Maths Math Help


Number arranging

The number of ways of arranging the 26 letters of the English alphabet = 26!. If a computer prints these arrangements at the rate of 1000 per second, how long will this take?


I have the numbers 0 - 49. The lock has three numbers in the combination with a right left right pattern What is the total number of possible combinations?

It's a math story problem.   It deals with a lock.  It uses three numbers from 0-49.  has three numbers in the combination with a right - left- right combination.  What was the total number of... more
Combinations Permutations


Permutations with equal amount of e and o

I have a follow up. How would I calculate the e and o combinations that have an equal amount of e’s and o’s in any combination for example with 2 to the forth power there are 16 combinations but... more


Combinations and Permutations

How many ways can 6 people work at 3 different offices if 2 people are in each office and 2individuals refuse to work together?


How many combinations of o and e 8 digits long can you make?

Is there a formula because I would also like to know how many combination of o and e 10 digits long. 


Baskin Robbins has 31 flavored of ice cream, 7sauces, and 10 toppings. How many sundaes can be made by choosing 3 ice cream flavors, 3 sauces, and 3 toppings?

Baskin Robbins has 31 flavored of ice cream, 7sauces, and 10 toppings. How many sundaes can be made by choosing 3 ice cream flavors, 3 sauces, and 3 toppings?
Combinations Maths Permutations


How to find The Numbers That are divisible by 4 or 7?

How to find numbers that are divisible by 4 or something else by permutations or combinations?


I have 54 pairs of shoes and 36 hats. How many ways can I select 1 pair of shoes and 1 hat?

I can not remember the formula.


If there are 28 numbers in a lotto game

If there are 28 number in a lotto game ranging from 1-28, every time it is drawn 6 numbers are selected ramdomly, but a number can’t be selected more than once, how many different combinations are... more


Jay is is to buy 6 cookies at the bakery. He can choose from sugar,ginger,chocolate, and Pbutter. How many diff assortments of cookies can he buy if he buys at

question finished here:   least one of each of the four kinds of cookies?
Combinations Precalculus Permutations


Cominatorics Question

A restaurant has 3 appetizers, 8 Main courses, 4 sides, 4 vegetable choices, and 6 dessert choices. How many ways could a diner create a meal containing exactly one item from each category? 


i have the following items of clothing how many outfits can i make

trousers 88 shirts 106 hats 146 jackets 213 scarf 91 shoes 114 masks 6
Combinations Math


possible combinations

i have a jar which must always be filled to 100%. i have 4 different items which can be placed into the jar to fill it. each item can be added in increments of 25%, and may be placed in the jar... more
Combinations Probablity


Find the probability of the given event.

An unbiased coin is tossed five times. Find the probability of the given event. (Round your answer to four decimal places.)The coin lands heads more than once.


prove that C(n,r)+3C(n,r-1)+3C(n,r-2)+C(n,r)=C(n,r)-3

It's a problem of combination.

how many arrangements are there of these digits 1,2,3,4,5 if the odd digits must be in ascending order

I know the answer is 20 but i can't figure it out


How many combinations of 2 can i make with 4 colors

Combinations with color problems for kids
Combinations Algebra 2


How many combinations of students are possible?

There are 30 students in a history class. Twenty percent of the students are randomly chosen to participate in a teacher evaluation 

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