A three-character password consists of 2 different digits between 0 and 9, inclusive, and 1 letter of the English alphabet. The letter must appear as first or second character. How many different passwords are possible?

Question

anonymous · Answer

@estudier

anonymous · Answer

there may be three two cases i hope 

1st alphabet and other two numbers

2nd alphabet and 1st and last numbers


in the first case: 26p1 + 10p2= 26+ 10*9= 116

and the second case is 10P1 + 26p1 + 10p1 = 46

so the sum will be the answer I hope...