An alarm system requires a 7-digit code using the digits 0 through 9. Each digit may only be used once in the code. How many dif

Question

2 years ago

8

ferent codes are possible

1 answer:

maks197457 [2] · Answer 1 · 2023-05-16T18:49:40+03:00

10M different codes are possible.

Probability Definition in Math-

Probability is a measure of the likelihood of an event to occur. Many events cannot be predicted with total certainty. We can predict only the chance of an event to occur i.e. how likely they are to happen, using it.
Four perspectives on probability are commonly used: Classical, Empirical, Subjective, and Axiomatic.
For example, the probability of flipping a coin and it being heads is ½, because there is 1 way of getting a head and the total number of possible outcomes is 2 (a head or tail). We write P(heads) = ½ .

It’s simple. there are 7 digits, so that would mean you start with 0,000,000 and end with 9,999,999.
If the highest digit is 9,999,999 and you add a 1 more to it, you have a total of 10M combinations.

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