153 Answered Questions for the topic Combinations

03/14/21

#### List of possible Matchups of NFL teams

Please list all possible matchups of all 32 NFL teams. The list of teams is below. I know there should be 31 x 31 total possibilities, but that inclues repetition such as Patriots vs Bills and...
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Combinations Probability

12/30/20

#### Probability and Combinations

show that 1)5 ( n ) = n ( n - 1 ) 5 42) r ( n ) = n ( n - 1 ) r r - 13) 2 ( 2n -1 ) = ( 2n ) n-1 n*the bracket includes the...
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12/08/20

#### Permutation and Combination Question

A bookshelf displays different types of books, 6 books in English (E) and 5 books in Spanish (S). If 4 books are chosen among the English language books and 3 are selected from the Spanish language...
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09/14/20

#### Solve the combination

At a chinese buffet, there are five entree selections. If two entrees may be selected, how many ways may the plates be filled?

09/09/20

#### Possible Combinations

Hi! I have to figure out how many possible combinations there are with 3 objects (square, circle, triangle), 3 per row. Also, 4 objects, 3 per row. Can you help me understand how you find the...
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Combinations

07/01/20

#### How Many Classes..

how many different course schedules can john have if he is taking 7 different classes and each class is offered every period? Assume there are 7 class periods in a day

10/07/19

#### Five cards are selected from a 52-card deck for a poker hand.

A royal flush is a hand that contains the A, K, Q, J, and 10, all in the same suit. What is the probability of being dealt a royal flush?

Combinations Permutations

09/23/19

#### Permutations HELP

Rework problem 30 from the Chapter 2 review exercises in your text, involving basketballs with defective valves. For this problem, assume the bag contains 16 basketballs, 6 of which have defective...
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Combinations Elementary Math

05/27/19

#### You have 9 windows that can be put in 3positions each, how many combinations are there for all 9 windows?

05/15/19

#### probability and permutations

The 10 letter tiles S A C D E E M I I and O are in a bag. What is the probability that the letters S A M E will be drawn from the bag in that order?

#### Combination problem with repetition. GRE Anagram Grid questions. Why do we divide?

If 7 people board an airport shuttle with only 3 available seats, how many different seating arrangement are possible? (Assume that 3 of the 7 will actually take the seats.) So I think the answer...
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#### Combination problem with repetition. GRE Anagram Grid questions. Why do we divide?

If 3 of 7 standby passengers are selected for a flight, how many different combinations of standby passengers can be selected? So the answer to do this I think is 7! / (4! * 3!) The standby...
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04/17/19

#### Statistics - Combos/Permutations

License plates in your state have 3 letters followed by 3 numbers. But in order to avoid confusion with the numbers,letters "I" and "o" are not used. How many different possible license plates can...
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Combinations Probability

03/25/19

#### As part of a quality-control program, 3 light bulbs from each batch of 100 are tested. In how many ways can this test batch be chosen?

03/19/19

#### Combinations [fundemental counting principal]?

> How many 3-digit integers can be chosen such that none of the digits
> appear more than twice and none of the digits equal zero?
I have approached the following problem like this.
1. We...
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03/13/19

#### Intuition behind combination problem?

I came across this question on a GRE practice exam. I'm trying to build intuition behind how to correctly approach these types of problems:
A reading list for a humanities course consists of 10...
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Combinations Elementary Math

02/13/19

#### How many different committees can be formed from 8 teachers and 32 students if the committee consists of 3 teachers and 4 students?

Combinations

11/25/18

#### Compute the number of a 5 card poker hands containing 2 red aces, 2 black kings, and 1 red queen

Combinations

11/25/18

#### a committee of five is going to be selected from a group of twenty people. How many different committees are possible if one person is the chair and the rest are general members?

Combinations

09/30/18

#### How many different four letter code words can be formed using the letters A, B, C, and D?

The options are:
1. 16
2. 24
3. 64
4. 120
5. 204
6. 256
7. 308

Combinations Probability

09/29/18

#### Combination question!

a survey is to be conducted and three people are to be chosen from a group of twenty. if the group contains 8 men and 12 women, how many groups containing exactly one man are possible

09/18/18

#### Rearranging Words Without Replacement

Irving wants to rearrange the letters in turkey without replacement. How many ways can he rearrange them with 't' being first and 'u' being second? Please show work. Thanks :)

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