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Advocard [28]
3 years ago
10

A 5-digit combination lock can be opened only if a correct combination of digits is chosen. Find the probability of guessing the

correct combination if:
A. no digit is repeated
B. digits can repeat and zero is not one of the digits in the combination
Mathematics
1 answer:
Anarel [89]3 years ago
3 0
1) If digits can not repeat, the number of possible variations is 10x9x8x7x6 =30,240

And the probaility of guessing is 1 / 30240 =0.000033

2) If digits can repeat an zero is no one of the digits, the number of possible variations is 9x9x9x9x9 = 9^5 = 59,049.

The probaility of guessing is 1/59,049 = 0.000017

 
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Last PreCalc Question, Need help with writing piecewise functions with graphs. Giving brainliest!
LekaFEV [45]

The piece-wise linear functions can be written as follows:

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<h3>What is a linear function?</h3>

A linear function is modeled by:

y = mx + b

In which:

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  • b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.

For x equal or less than -2, the line passes through (-3,-3) and (-2,-2), hence the rule is:

f(x) = x, x \leq -2.

For x greater than -2 up to 1, the y-intercept is of -7, and the line also passes through (1,-8), hence the rule is:

f(x) = -x - 7, -2 < x \leq 1.

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The rule is:

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When x = 2, y = -5, hence:

-5 = 2(2) + b

b = -9.

Hence:

f(x) = 2x - 9, x > 1.

More can be learned about linear functions at brainly.com/question/24808124

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