Select all of the following problem situations that involve permutations. how many ways can you arrange 4 of the letters of the word solve if no letter can be used more than once? there are 75 different varieties of cereal at the store. how many ways can you choose 3 different varieties? there are 9 books on your summer reading list. how many ways can you choose 3 to read? there are 8 schools competing in the final round of the national swim relay. how many ways can the gold, silver, and bronze medals be awarded? how many 4-digit access codes are possible using the numbers 1 through 6 if each number can only be used once?