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harkovskaia [24]
3 years ago
10

A computer system requires that passwords contain at least one digit. if eight characters are generated at random, and each is e

qually likely to be any of the 26 letters or 10 digits, what is the probability that a valid password will be generated?
Mathematics
1 answer:
KIM [24]3 years ago
6 0
Figure this out as though no digits are present. You can choose 8 of the 26 letters and that's it.
26^8 [you can allow repeating letters]  =  2.088 * 10^11
The total number of ways that can be chosen with letters and digits intermixed = 36^8

The probability of getting no numbers is 26^8 / 36^8 or (26/36)^8 = 0.07402
So the probability that there were be at least one digit is
1 - 0.07402 = 0.92598
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4 0
3 years ago
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Answer: 220 yards

Step-by-step explanation:

1 mile equals 1,760 yards

1,760 ÷ 8 = 220 yards

8/8 is 1... so that 1 is equal to the 1,760

You could divide it by 8 as shown above OR to double check yourself.. take your answer of 220 yards and add that 220 to 220 a total of 8 times which will give you your 1 mile equaling to 1,760 total yards which makes 1/8 mile equal the 220 yards. (I really hope this helps and makes sense as to how I figured that out for you:-) )

3 0
3 years ago
The table shows the number of candid pictures of students for the yearbook for two consecutive years. Year Number of Photos 2015
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Answer:

The percentage decrease in the number candid student pictures for the yearbook from 2015 to 2016 is approximately 9.3 percent

Step-by-step explanation:

The given data can be presented as follows

Year           {}                      Number of Photos

2015           {}                      236

2016           {}                      214

The percentage decrease in the number of candid pictures is give by the following formula

Percentage \ Decrease = \dfrac{Original \ Value- New \ Value}{Original \ Value}  \times 100

Where;

Original value for the number of pictures = 236

New value for the number of pictures = 214

Substituting the values into the equation for the percentage decrease gives;

Percentage \ Decrease = \dfrac{236- 214}{236}  \times 100 = \dfrac{550}{59} \ percent\approx 9.3 \%

The percentage decrease is approximately 9.3 percent.

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