You want to multiply together the number of possible choices for each digit in the code.
0-9 is ten possible numbers, since repetitions are allowed (example code 2,2,2,2) there are ten possible choices per digit in the code.
10*10*10*10 = 10,000 four digit coded possible
Easy so you have to choose them then add them and yeah hope this helps bbg
step (1) 32+23*4 =124 step (2) 9+23*4= 101 step (3) 9+9*4=45 step 4 9+35=44
Step-by-step explanation:
11 and 12
since 11*11 equals 121 and 12* 12 is 144
