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

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

I know that the answer 84, but I just can't seem to get that number

NON ACADEMIC QUESTION: Over the years I have struggled with a (social) math problem involving organising golfers in a travelling group so as to maximise playing combinations whilst minimising duplication...

The answer is 125 if that helps

I have been stuck on this for a while now

In how many ways can a committee consisting of 4 faculty members and 5 students be formed if there are 7 faculty members and 13 students eligible to serve...

I want to generate permutation of large number and also control the outputs. Forexample, permutation 10 numbers (1,2,3,4,5,6,7,8,9,0). Since the output will be large, I want to be able to put parameters...

The answer is 30 if that helps

The answer is 120 if that helps

Permutations in how many ways can five examinations be scheduled in a week so that no two examinations are scheduled on same day considering sunday as a holiday

A family consists of a mother, a father, 2 girls and 2 boys. How many different ways can they be arranged in a line if the boys are together and the girls are not? I have no idea how...

I have 4 results represented by A, B, C and D I have the probabilities for whether each result will be greater than the other: P(A>B): 86.6% P(A>C): 80.4% P(A>D):...

Hi! Just as a follow up question that I don't understand (and if someone could explain how this works) 1) There are 2 red and 4 green identical marbles arranged in a line. How many different arrangements...

Assume that there are 16 board members: 11 females, and 5 males including Neville. There are 3 tasks to be assigned. Note that assigning the same people different tasks constitutes a different assignment...

find the number of possibilities in each scenario

How many arrangement can be made from letters v,w,x,y,z taking all letters at a time if v must be second and z never be last

It's a college task. I Know how to find permutation of numbers, letters etc., but this is completely different. Here's the task : A Student is studying in a university. All study modules...

Secretary/manager assignments--From a pool of 7 secretaries, 3 are selected to be assigned to 3 managers, 1 secretary to each manager. In how many ways can this be done?

http://www.creativecrafthouse.com/index.php?main_page=product_info&cPath=143&products_id=990 he has the number listed as 7.2 Billion but i cant get the number wen i try the...

A committee of six people is formed to investigate connections between business and the education system. It consists of people chosen from 5 students, 8 teachers, 5 Principles, 10 parents, 4 professors,...