# 11.6.2. Factorial of a Number - Permutations

Evaluate .

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Determine the number of ways 2 boys can sit on 8 seats in a row.

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Evaluate .

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Evaluate .

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How many ways can 9 people in 9 seats be arranged in a circle shape?

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How many words can be formed from 5 different letters?

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Determine the number of ways 6 children can sit in a circle.

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In how many ways the letters of the word "soon" can be rearranged?

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In how many ways can a president and vice president be elected from a 399-member committee?

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If , find .

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If , find .

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Evaluate .

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From the set {c, e, i, m, o, x, k, j, n, l}, find the number of ways to select 5 different letters.

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Determine the number of ways of selecting a letter from the set of letters {d, f, k}.

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If , find .

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Determine the number of ways a 7-digit number can be formed from 7 digits, given that each digit can NOT be used more than once.

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Determine the number of ways of selecting 2 teachers from 19 ones; one is to train some students in mathematics, and the other is to prepare their test.

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Evaluate .

• A
• B
• C
• D
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Given that the number of teams in a football league is 8, and each team has to play 2 matches with each of the other teams, find the total number of matches that were played.

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Evaluate .

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