An atm personal identification number (pin) consists of four digits, each a 0, 1, 2, . . 8, or 9, in succession. a. how many different possible pins are there if there are no restrictions on the choice of digits?

An atm personal identification number (pin) consists of four digits, each a 0, 1, 2, . . . 8, or 9, in succession.

a. How many different possible pins are there if there are no restrictions on the choice of digits?

Solution: The are total 10 numbers between 0 and 9.

Also there are no restrictions on the choice of digits. Therefore, the possible number of different PINs is:

Therefore, there are 10,000 different possibles PINs.

answer: the first graph

step-by-step explanation:

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column