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masha68 [24]
3 years ago
15

A hacker is trying to guess someone's password. the hacker knows (somehow) that the password is 12 characters long, and that eac

h character is either a lowercase letter, (a, b, c, etc), an uppercase letter (a, b, c, etc) or a numerical digit (0, 1, 2, 3, 4, 5, 6, 7, 8, or 9). assume that the hacker makes random guesses.
Mathematics
1 answer:
STALIN [3.7K]3 years ago
6 0
Determine first the places that will be filled:

26 + 26 + 10 = 62 ways

The number of possible passwords is limited to 12 characters
Thus,

= 62^12 (assume that repetition is allowed)

The probability of guessing correctly = 

(1/62)^12
= 3.099557704 x 10^-22 (note that it is in scientific notation form)
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2 years ago
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Simplify -3y+2x-5y-7x
Sphinxa [80]
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<em><u>Solution:</u></em>

<em><u>Given that, we have to simplify</u></em>

-3y + 2x-5y-7x

We can simplify the above expression by combining the like terms

Like terms are terms that has same variable ( with same exponent) with same or different coefficient

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2 years ago
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