Joan wants to set a 4-digit unlock code for her mobile phone. She plans to use only odd numbers and to make sure that no number

Question

9 months ago

6

is used more than once. How many different unlock codes are possible.

1 answer:

LuckyWell [14K] · Answer 1 · 2024-08-12T20:23:15+03:00

6 0

Answer: 120

Step-by-step explanation:

There are 5 digits that are odd, 1 3 5 7 9

There are 5 possibilities for the first digit, 4 for the second, 3 for the third, and 2 for the last, so there are 5 x 4 x 3 x 2 = 120