1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nata [24]
3 years ago
7

How many ten-digit numbers have at least two equal digits?

Mathematics
1 answer:
hammer [34]3 years ago
3 0

Answer:

8,996,734,079 numbers

Step-by-step explanation:

First let's find the number of ten-digit numbers.

The maximum ten-digit number is 9,999,999,999 and the minimum is 1,000,000,000. So the number of ten-digit numbers is:

N(total) = 9999999999 - 1000000000 = 8,999,999,999

Now, to find the number of ten-digit numbers with at least two equal digits, we can find the number of ten-digit numbers with all digits different, and then subtract this amount from the total ten-digit numbers.

To find the number of ten-digit numbers with all digits different, we can use the following logic:

The first digit can have 9 different values (0 not included), the second can also have 9 (one digit used), then the third can have 8 (two digits used), the fourth can have 7, and so on. So we have that:

N(different) = 9*9! = 3,265,920

Then the number of ten-digit numbers with at least two equal digits is:

N(two\ equal) = N(total)-N(different) = 8999999999 - 3265920

N(two\ equal) = 8,996,734,079

You might be interested in
Please solve this literal equation for the variable "f"
Tatiana [17]
\frac{df+10}{6}= g

Now, multiply both sides by 6 and you get.....

 df+10=6g

now, subtract 10 on both sides and you get.....

df=6g-10

now divide both sides by d to get f by itself and you get........

f= \frac{6g-10}{d}

8 0
3 years ago
Make a tree diagram which shows the sample space of rolling a cube with faces numbered 1-6 and flipping a fair coin. Using this
Doss [256]

Answer:

C.)  P(5, H) = 1/12

Step-by-step explanation:

8 0
3 years ago
Solve for x in the second equation and substitute it into the first equation. The result is .
Mice21 [21]
Where is the equation?
6 0
2 years ago
Please help me ASAP
Liula [17]
I would say answer choice 1. It’s the only one that makes sense.

I hope this helps! Let me know if you have any questions! Good luck on the rest of your assessment!

Mark this as Brainliest if you get a chance:)
6 0
2 years ago
Read 2 more answers
What does the median do in a box plot
iogann1982 [59]

Answer:

the median marks the middle or the mid-point of the data and is often shown by the line that divides the box into two parts.

Step-by-step explanation:

hope this helps:)

6 0
2 years ago
Read 2 more answers
Other questions:
  • Can you answer this please ?
    10·1 answer
  • On the class field trip, there were 4 teachers and 35 students. What is the ratio of students to teachers on this trip?
    9·1 answer
  • All my brain cells have left me I don't understand math please help! lol
    15·1 answer
  • Evulate: m/5<br><br> When: m= 30
    14·1 answer
  • The probability that a person will have 0, 1, or 2 dental checkups per year is 0.3, 0.6, and 0.1, respectively. If seven people
    14·1 answer
  • Find an equation of the plane. The plane that passes through the line of intersection of the planes x − z = 3 and y + 4z = 1 and
    15·1 answer
  • Lcm of 2/5 and 5/18?
    7·1 answer
  • Please help......
    10·1 answer
  • CAN ANYONE HELP ME THAT IS GOOD IN MATH
    12·1 answer
  • 9. Given a circle with a radius of 6, determine its sector area with an angle measure of 120°.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!