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These questions are about permutations

How can I figure out how many inversions of permutations? I have the answers but I don't know how to get there.Questions:
1. 2 answers
2. asked by Me
3. 443 views
Find the probability that if the letters of the word "parallel" are randomly arranged that the L's will not be together.In
1. 1 answer
2. asked by Candice
3. 1,593 views
make me a real life questions using both combinations and permutations
1. 1 answer
2. 49 views
The letters of the word STAR are written on individual cards.If you always choose three cards and then put them back before the
1. 1 answer
2. 92 views
Determining the number 5-card hands that can be drawn from a deck of 52 requires use of ?(1 point) Responses substitution
1. 1 answer
2. 50 views
There is a test with 10 questions. Each question has a choice of three answers, but only one answer is correct. How many ways
1. 1 answer
2. asked by Mike
3. 588 views
Determining the number of 3-person committees formed from a club with 12 members requires use of ? (1 point) Responses
1. 1 answer
2. 65 views
These questions are about permutations and combination:Find the number of ways in which a class of 20 children can be divided
1. 4 answers
2. asked by Claire
3. 630 views
Hi! Can someone check my answers? Thanks!!Directions: Tell whether the following questions are either permutations or
1. 2 answers
2. asked by Callie
3. 770 views
Hi! Can someone check my answers? Thanks!!Directions: Tell whether the following questions are either permutations or
1. 1 answer
2. asked by Callie
3. 922 views