How many 5-digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5, 6, if repetition of digits is not allowed? a. 119 c. 2520 b. 16,807 d. 120 Please select the best answer from the choices provided A B C D

1st digit 1 of 7 numbers2nd digit 1 of 6 numbers3rd digit 1 of 5 numbers4th digit 1 of 4 numbers5th digit 1 of 3 numbers7*6*5*4*3 = 2520 combinations