SOLUTION: A four-character password consist of the alphabet and three different digit between 0 and 9, inclusive. The letter must appear as the second or third character of the password. H

Algebra ->  Permutations -> SOLUTION: A four-character password consist of the alphabet and three different digit between 0 and 9, inclusive. The letter must appear as the second or third character of the password. H      Log On


   

Question 418576: A four-character password consist of the alphabet and three different digit between 0 and 9, inclusive. The letter must appear as the second or third character of the password. How many different passwords are possible?
Answer by sudhanshu_kmr(1152) About Me  (Show Source):
You can put this solution on YOUR website!
no. of ways when letter appear as the second = 10*26*9*8 = 18720

no. of ways when letter appear as the third = 10*9*26*8 = 18720

total no. of ways = 2*18720 = 37440