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111 Answered Questions for the topic Combinations And Permutations

Combinations And Permutations

10/05/15

Police ask 5 witnesses, one by one, to identify their suspects among 6 people lined up in front of a wall.

Find probability that exactly 3 witnesses point at the same person. Please leave answer as an expression.  
Combinations And Permutations

09/20/15

A group of 7 males..

A group of 7 males and 7 females volunteer for a medical study. Three volunteers are selected. How many ways can the three subjects be selected from the 14 volunteers? How many selections contain... more
Combinations And Permutations

09/17/15

Sophia went on a shopping spree.She bought 7 tops, 3 shorts and 4 pairs of sandals.How many different outfits are possible if each outfit consists of tops,

Sophia went on a shopping spree. She bought 7 tops, 3 shorts and 4 pairs of sandals. How many different outfits are possible if each outfit consists of tops, shorts and sandals
Combinations And Permutations

09/15/15

How many two or three..

How many two or three letter fraternity names cane be formed from the 24 letters of the greek alphabet allowing repeats in any name?
Combinations And Permutations

09/13/15

Is this a permutation or combination?

The ski club with ten members is to choose three officers captain, co captain, and secretary. How many ways can these officers be filled?
Combinations And Permutations

09/11/15

In how many ways can the...

In how many ways can the letters of the word CAT be arranged to form three letter words, if you are permitted to repeat a letter any number of times.
Combinations And Permutations

09/08/15

In how many ways can you select a team where there is a captain and an assistant captain

A group of 30 students try out for a soccer team, which consists of 11 players.
Combinations And Permutations

06/30/15

A restaurant offers a choice of 3 sandwiches, 3 chips, and 5 soft drinks. How many combinations are offered?

Please show work. Thank you!
Combinations And Permutations Math Question

05/10/15

a parade has 50 floats for a contest. a trophy is being given out for 1st and 2nd place how many ways can we have trophies can we have awarded

 a parade has 50 floats for a contest. a trophy is being given out for 1st and 2nd place how many ways can we have trophies can we have awarded
Combinations And Permutations Math

04/30/15

You’ve decided you may want to join your Home Owner’s Association (HOA) Governing Board. There are 25 residents (10 males and 15 females) interested in being o

You’ve decided you may want to join your Home Owner’s Association (HOA) Governing Board.  There are 25 residents (10 males and 15 females) interested in being on the HOA board.   8. If the board... more
Combinations And Permutations Probability Permutations

04/20/15

How many different values are possible for the random variable Y?

involving drawing calculators from a box of working and broken calculators. Assume that the box contains 14 calculators: 12 that work and 2 that do not work. A sample of 3 calculators is selected... more
Combinations And Permutations Probability Permutations

04/20/15

How many different values are possible for the random variable X

Assume that the machine yields the item selected 70 percent of the time, and returns nothing 30 percent of the time. Three individuals attempt to use the machine. Let X be defined as the number of... more
Combinations And Permutations Probability Permutations

04/20/15

How many different values are possible for the random variable X?

involving the selection of two students from a committee of students. Assume that the committee is made up of 2 males and 5 females. Two are selected at random, and a random variable X is defined... more
Combinations And Permutations Combinations

04/16/15

The length of the password must be six characters. The first five characters must be alphabetic and the sixth character must be numeric. How many different pas

 The length of the password must be six characters. The first five characters must be alphabetic and the sixth character must be numeric.How many different passwords can be generated? 
Combinations And Permutations Probability Permutations

04/15/15

(1) What is the probability that she remembers to bring her briefcase every day in one week (5 days)?

about the professor who sometimes forgets to bring her briefcase to the office, but assume that, each day, the probability that she forgets the briefcase is 1/6. Assume that her forgetting is a... more
Combinations And Permutations Probability Permutations

04/15/15

What is the probability that at least one mouse is female, given that exactly one is gray?

Assume that you have 10 mice in the cage: 4 white males, 3 gray females, and 3 gray males. Two mice are selected simultaneously and at random, and their colors are noted.What is the probability... more
Combinations And Permutations Probability Permutations

04/15/15

What is the probability that both balls are red given that the first ball you drew was red?

Assume that each bag contains 5 balls. Bag a contains 3 red and 2 white, while bag b contains 1 red, 3 white, and 1 blue. You randomly select one ball from bag a, note the color, and place the ball... more
Combinations And Permutations Probability Permutations

04/15/15

What is the probability that at least one inspector will find a defective widget?

Assume that the box contains 2 defective widgets and 10 acceptable widgets. There are 4 inspectors, each of whom selects a widget from the box at random, inspects it, and then replaces it in the... more
Combinations And Permutations

04/12/15

six lines are to be drawn in a plane what is the possible number of points of intersection among the six lines

not sure how to do this. 
Combinations And Permutations Probability Permutations

04/10/15

What is the probability that the student attends at least one class on Monday?

involving a student's attendance at math and accounting classes on Mondays. Assume that the student attends math class with probability 0.65, skips accounting class with probability 0.25, and... more
Combinations And Permutations Probability Permutations

04/10/15

What is the probability that the Toyota leaves first?

Assume that there are 8 cars: 2 Chevrolets, 5 Fords, and 1 Toyota. Two cars leave at random, one after the other. Draw a tree diagram and use it to answer the following questions.(1) What is the... more
Combinations And Permutations Probability Permutations

04/10/15

What is the probability of getting exactly 4 correct answers?

about a multiple-choice test in which each question has 4 choices only one of which is correct. Assume that 9 questions are answered by guessing randomly.What is the probability of getting exactly... more
Combinations And Permutations

03/26/15

Combination of different main and side dishes

John is going to a community cookout. At the cookout he can have a meal using any combination of 9 sides and 4 main dishes, as shown in the menu below. A.) John wants a meal with 3 different sides... more
Combinations And Permutations

03/06/15

A plumber received calls from 5 customers. There are 6 open slots on today's schedule.how many ways can the plumber schedule the customers?

A plumber received calls from 5 customers. There are 6 open slots on today's schedule.how many ways can the plumber schedule the customers?
Combinations And Permutations Probability Permutations

03/05/15

What is the probability they sum to 9, 3, or 6?

involving the sum of two die rolls.(1) What is the probability they sum to 9, 3, or 6? (2) What is the probability they sum to at least 7?

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