0
the repeated digits can lie in any of 3 positions:
XXYZ,YXXZ, or YZXX
Therefore, the number of different possible repeated digit combinations is 10×3=30 (there are 10 different possible digits).
There are then 9 values left that Y could be, after the X's have their values, and 8 values left that Z could be, to ensure no unintended repeated numbers.
This gives (10×3)×9×8=2160. There are therefore 2160 possible codes.
What else can I help you with?
Which 4-digit numbers can be formed by the digits 1 2 3 4 5 6 7 8 9 0?
This permutation problem depends on whether the numbers are allowed to be repeated. If they are, there are a possible 9999 numbers, starting with 0001 and running sequentially to 9999. If they are not allowed to be repeated, there are a possible 5040 combinations.
What if no numbers are repeated to find the mode?
If no number is repeated then every number that appears once is a mode. They appear once, which is more often than any numbers that do not appear at all.
Definition of mean in math?
The meaning of mean is all the numbers added up and then divided by however many numbers there are.Mean- you add all the numbers up then divide the number of number their are in the problem.
How do you find the mode of numbers?
the mode of a set amount of numbers is the number that is repeated the most, if you have two numbers then add them together and divide them by 2.
How do you indicate a repeating decimal?
If handwritten, draw a line over the repeated numbers.
How do you find how many pairs are there in any given group of numbers?
If there are n numbers in the group, there aren2 ordered pairs if the numbers can be repeated,n*(n-1) ordered pairs if the numbers cannot be repeated,n2/2 pairs if the numbers can be repeated,n*(n-1)/2 pairs if the numbers cannot be repeated.
Which 4-digit numbers can be formed by the digits 1 2 3 4 5 6 7 8 9 0?
This permutation problem depends on whether the numbers are allowed to be repeated. If they are, there are a possible 9999 numbers, starting with 0001 and running sequentially to 9999. If they are not allowed to be repeated, there are a possible 5040 combinations.
How many combinations of 2 numbers are there in 6 numbers?
If numbers may be repeated . . . 36 If numbers may not be repeated . . . 30 If the sequence doesn't matter . . . 15
Which cable company offers premium packages to their customers?
All companies offer premium packages to customers. It is however always for an additional fee, with the numbers varying for each individual company and their customers.
If a code contains 4 letters and 2 numbers how many possible outcomes are there?
If the numbers and letters can be repeated then there are 45,697,600 possible outcomes. If the letters and numbers can not be repeated there are 32,292,000 possible outcomes.
How do you find the mode when only three numbers are repeated twice?
All the repeated ones are the mode.
Why is calculus interesting?
Calculus is interesting because it is incredible that human intelligence has discovered a way to solve a problem using a formula that can be repeated. Calculus is not necessarily about the numbers, but about the fact that we can apply rules and theories to numbers in a variety of situations.
Is surface area repeated when there is 2 of the same numbers?
no
What number has four prime numbers that are not repeated?
2357
What is the number that can be divided by all prime numbers and has no repeated factor?
There is no such number. Since there are infinitely many prime numbers, the only number that can be divided by all of them is zero. But that can also be divided by numbers with repeated factors.
How many 7 digit phone numbers can be formed if all the numbers can be repeated?
823543
What is the probability of three digit numbers without repeated digits with numbers 0123456?
It is possible to create a 3-digit number, without repeated digits so the probability is 1.
