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149 Answered Questions for the topic Combinations

Combinations

2d

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
Combinations Probability Permutations

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... more
Combinations Probability Permutations

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?
Combinations Gre Gre Exam

04/20/19

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... more
Combinations Gre Gre Exam

04/18/19

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... more
Combinations Math Statistics

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... more
Combinations Gre Probability

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... more
Combinations Gre Probability

03/19/19

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... more
Combinations Gre Probability

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... more
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
Combinations Math Geometry

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 :)
Combinations Math Knowledge Check

08/28/18

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? 
Combinations Statistics Probability

08/02/18

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

07/09/18

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?
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