A bicycle lock has a four-digit code of which each digit is a number from 0 to 9. Which of the following expressions correctly

Question

A bicycle lock has a four-digit code of which each digit is a number from 0 to 9. Which of the following expressions correctly represents the number of possible codes the lock can have?
9x8x7x6
10 x 9 x 8 x 7
9x9x9x9
10 x 10 x 10 x 10

Kunduz · Accepted Answer

Click to see the answer