Question

Koshi creates a password as follows: number, special character, letter, letter, number If there are 12 special characters and Koshi does not repeat a letter or number, how many possibilities are there for his password? a. 702,000 b. 730,080 c. 780,000 d. 811,200

Answer 1

a.702,000

Explanation:

Answer 2

Number of possibility for 1st character = 10
Number of possibilities for 2nd character = 12
Number of possibilities for 3rd character = 26
Number of possibilities for 4th character = 25
Number of possibilities for 5th character = 9

Therefore, number of possibilities for his password = 10 x 12 x 26 x 25 x 9 = 702,000