Example 3.4.2 Permutations
PRACTICE EXERCISES
| 1. | a) | How many ways can the letters in the word NUMBER be
arranged in a row? |
| b) | How many ways can three of the letters of the
word NUMBER be selected and arranged in a row? |
|
| c) | How many ways can the letters in the word NUMBER be
arranged if the letters ER must remain next to each other (in order)
as a unit? |
|
| 2. | In how many ways can you place eight people around
a table, if one of the eight always sits in the same seat? |
|
| 3. | a) | Given six cards in different colors {green, yellow,
blue, red, white, black}, how many different ways can four of the cards
be chosen and put in a row? |
| b) | How many different ways can this be done if the
first card must be yellow? |
