Question

do you have a password with 4 letters followed by 4 even digits between 0 and 9 , and exclusive . Is the characters in ditches cannot be used more than once, how many choices do you have for your password?

Answer 1

We have 26 letters and 5 digits 0, 2, 4, 6, and 8 in our possession

26x25x24x23x5x4x3x2 = 43056000 different choices are possible.