How many different 6 letter radio station call letters can be made if a the first letter must be K Y Q or N and no letter may be

Question

How many different 6 letter radio station call letters can be made if a the first letter must be K Y Q or N and no letter may be repeated b repeats are allowed but the first letter is K Y Q or N c the first letter is K Y Q or N there are no repeats and the last letter is J a If the first letter must be K Y Q or N and all the letters in the radio station call letters must be different then there are 25502400 6 letter radio station call letters b If the first letter must be K Y Q or N and letters can be repeated then there are 47525504 radio station call letters c If the first letter must be K Y Q or N and the last letter must be J and all the letters in the radio station call letters must be different then there are 6 letter words

Kunduz · Accepted Answer

Click to see the answer