A combination lock is to have 4 digits (using the numbers from 1 to 9 (ie No Zero)How many different combinations are there that

Question

OleMash [197]

3 years ago

10

A combination lock is to have 4 digits (using the numbers from 1 to 9 (ie No Zero)How many different combinations are there that

have all different numbers.

Mathematics

1 answer:

tiny-mole [99] · Answer 1 · 2022-12-06T01:51:43+03:00

Answer:

3024

Step-by-step explanation:

You have to think of this in choices. You have 9 choices for the first lock (because there are 9 numbers). We would have 9 choices for the second lock, but we used one number for the previous one. So we would have 8 choices. We would continue with 7 choices for the third lock and 6 for the fourth.

Multiplying this we get 9x8x7x6=3024