Preston needed a 5 letter password for his e-mail account. To make things easier for himself, he decided to use only the letters in his name for the password. If each letter must be different, how many possible passwords can there be?

Question

tad1 · Answer

7!

anonymous · Answer

posible ancers7 × 6 × 6 × 6 × 6
 	7 × 7 × 7 × 7 × 7
 	7 × 6 × 7 × 6 × 7
 	7 × 6 × 5 × 4 × 3

tad1 · Answer

There are seven different letters for the first position.  Having used one of the letters, there are only 6 letters to choose from for the second positionetc.
But my first answer was incomplete as you have oly 5 spaces to fill.  so the answer is 7(6)(5)(4)(3)

anonymous · Answer

thank you