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07-04-2022
Mathematics

contestada

A safe's lock has a three number combination. The
numbers on the safe lock are 0 - 9. How many
combinations are possible if no number may be used
more than once?

Respuesta :

mhanifa mhanifa

07-04-2022

Answer:

720 combinations

Step-by-step explanation:

Each number has initially 10 options.

If one option used for the first number then the second number has one less, 9 options. Similarly, the third number has one less number of options than the second number, 8 options.

Total number of combinations is

10*9*8 = 720

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