How many different radio call letters beginning with K and consisting of four be assigned to stations?

To solve this counting problem, we need to consider the number of choices for each position in the call letters. There are 26 letters in the alphabet, and we can assume that any letter can be used in any position.

Number of choices for the first letter (excluding K): 25

Number of choices for the second letter: 26

Number of choices for the third letter: 26

Number of choices for the fourth letter: 26

To find the total number of different radio call letters, we multiply the number of choices for each position.

Total number of different call letters = 25 * 26 * 26 * 26 = 456,976

Therefore, there are 456,976 different radio call letters beginning with K and consisting of four letters.