Question

Students Ana Beatriz and Paula decided to register on a website with exercises to study for upcoming simulations, but to register on this website, they need to choose a password consisting of five characters, three numbers and two letters (capital letters). or lowercase). Letters and numbers can be in any position. They know that the alphabet is made up of twenty-six letters and that an uppercase letter differs from a lowercase letter in a password. What is the total number of possible passwords for registering on this site?

163

likes
813 views

Answer to a math question Students Ana Beatriz and Paula decided to register on a website with exercises to study for upcoming simulations, but to register on this website, they need to choose a password consisting of five characters, three numbers and two letters (capital letters). or lowercase). Letters and numbers can be in any position. They know that the alphabet is made up of twenty-six letters and that an uppercase letter differs from a lowercase letter in a password. What is the total number of possible passwords for registering on this site?

Expert avatar
Maude
4.7
104 Answers
To find the total number of possible passwords, we need to calculate the number of ways we can arrange the characters.

First, let's calculate the number of ways to choose the position for the numbers. Since we need to choose three numbers out of the five positions, this can be done in $${5 \choose 3}$$ ways.

Next, let's calculate the number of ways to choose the position for the letters. Since we need to choose two letters out of the remaining two positions, this can be done in $${2 \choose 2}$$ ways.

Finally, for each position that has a number, we have 10 choices (0-9), and for each position that has a letter, we have 52 choices (26 lowercase letters + 26 uppercase letters).

Therefore, the total number of possible passwords is:

$$ {5 \choose 3} \times {2 \choose 2} \times 10^3 \times 52^2$$

Simplifying this expression, we get:

$$\frac{5!}{3!\cdot(5-3)!} \times \frac{2!}{2!\cdot(2-2)!} \times 10^3 \times 52^2$$
$$\frac{5!}{3!\cdot2!} \times 1 \times 10^3 \times 52^2$$
$$\frac{5 \times 4}{2} \times 1 \times 10^3 \times 52^2$$
$$10 \times 1 \times 10^3 \times 52^2$$
$$10 \times 10^3 \times 52^2$$
$$10^4 \times 52^2$$

Calculating this expression, we find:

$$10^4 \times 52^2 = 27040000$$

Answer: The total number of possible passwords for registering on this site is 27,040,000.

Frequently asked questions (FAQs)
Question: Solve for x: log(base 4)(x - 2) + log(base 4)(x + 3) = 2
+
Math question: What is the 4th derivative of f(x) = 2x^5 + 3x^4 - 4x^3 + 7x^2 - 8x + 9?
+
Question: Find the axis of symmetry of the parabola given by the function 𝑦 = -3𝑥^2.
+
New questions in Mathematics
The gross domestic product the gdp for the United States in 2017 was approximately $2.05x10^3. If you wrote this number in standard notation , it would be 205 followed by how many zeros
the value of sin 178°58'
(5-(4-3)*3)-(8+5))
To celebrate the five-year anniversary of a consultancy specializing in information technology, the administrator decided to draw 3 different qualification courses among its 10 employees. Considering that the same employee cannot be drawn more than once, the total number of different ways of drawing among employees is:
2.3/-71.32
Find the derivatives for y=X+1/X-1
4x/2+5x-3/6=7/8-1/4-x
What is the total tolerance for a dimension from 1.996" to 2.026*?
Determine the general equation of the straight line that passes through the point P (2;-3) and is parallel to the straight line with the equation 5x – 2y 1 = 0:
The average number of babies born at a hospital is 6 per hour. What is the probability that three babies are born during a particular 1 hour period?
20% of 3500
Next%C3%B3n%2C+we+are+given+a+series+of+Tri%C3%A1angles+Right%C3%A1angles+%3Cbr%2F%3Ey+in+each+one+of+them+ are+known+2%28two%29+measurements+of+sides.+%3Cbr%2F%3Elet's+determine+all+trigonom%C3%A9tric+ratios.
We have two distributions: A (M = 66.7, 95% CI = [60.3, 67.1]) / B (M = 71.3 95% CI = [67.7, 74.9]). Erin maintains that B is significantly larger than A. Provide your opinion on Erin’s argument and justify your opinion.
We plan to test whether the mean mRNA expression level differs between two strains of yeast, for each of 8,000 genes. We will measure the expression levels of each gene, in n samples of strain 1 and m samples of strain 2. We plan to compute a P-value for each gene, using an unpaired two-sample t-test for each gene (the particular type of test does not matter). a) What are the null hypotheses in these tests (in words)? [2] b) If, in fact, the two strains are identical, how many of these tests do we expect to produce a P-value exceeding 1/4? [2]
A given initial capital in simple interest at the annual rate and for 27 months produced the accumulated capital of 6600 um if the same capital had been invested at the same rate but during 28 months the said accumulated capital would be increased in an amount corresponding to 0.75% of the initial capital Calculate the initial capital and the annual rate at which it was invested
Write the inequality in the form of a<x<b. |x| < c^2
x²-7x+12=0
Solve the following system of equations using substitution. y=-4x- 11. 3x+7y=-2
The perimeter of a rectangular rug is 42 feet. The width is 9 feet. What is the length?
-1/3x+15=18