# How many five digit numbers can be formed using only 1 3 5 7 and 9 if repetitions are allowed?

## How many five digit numbers can be formed using only 1 3 5 7 and 9 if repetitions are allowed?

So, possible number of five-digit numbers that can be formed = (5^5) = 3125. So, for these 3125 five-digit numbers, sum of the digits at each place = (3125 / 5) * (1 + 3 + 5 + 7 + 9) = (625 * 25) = 15625.

How many numbers can you make out of 1234?

For the third digit there are only 2 choices and for the last digit, one choice. Thus if you are not allowed to repeat a digit the number of possible 4 digit numbers you can construct from 1,2,3,4 is 4 3 2 1 = 24.

How many three digits numbers can be formed using the digits 1 2 3 4 5 if digits Cannot be repeated?

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Hence we can form (6)(5)(4) = 120 numbers of three digits using the digits 1,2,3,4,5,6 without repetition.

### How many 3 digit numbers can be made using digit 1,2 and 3 if none of the numbers are repeated?

Originally Answered: How many 3-digit numbers can be formed using only1, 2, 3? This is because you have space for three digits that can be chosen from the set [1,2,3]. So you can make 27 three digit different numbers .

How many combinations can you make with 5 numbers?

Assuming no five-digit number can begin with zero, there are 9 possible choices for the first digit. Then there are 10 possible choices for each of the remaining four digits. Therefore, you have 9 x 10 x 10 x 10 x 10 combinations, or 9 x 10^4, which is 90,000 different combinations.

How many 9 digit number combinations are there?

Therefore, by multiplying the choices we have a total number of possibilities given by 9×9×8×7×6×5×4×3×2=3265920. Hence, 9 digit numbers of different digits can be formed in 3265920 ways.

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## How many 3 digit no can be formed?

The value of r will be 3, as we need a form 3 digit number only. Hence, 24 3-digits numbers can be formed without using the digits 0, 2, 3, 4, 5 and 6.

How many number combinations can you make with 3-digits?

There are, you see, 3 x 2 x 1 = 6 possible ways of arranging the three digits. Therefore in that set of 720 possibilities, each unique combination of three digits is represented 6 times. So we just divide by 6. 720 / 6 = 120.

How many possible combinations does it list?

It will list all possible combinations, too! However, be aware that 792 different combinations are already quite a lot of to show. To avoid a situation where there are too many generated combinations, we limited this combination generator to a certain, maximum number of combinations (2000 by default).

### How many combinations can you make with the NCR calculator?

Every letter displayed in the nCr calculator represents a distinct color of a ball, e.g., A is red, B is yellow, C is green, and so on. If you choose only one element r = 1 at once from that set, the number of combinations will be 12 – because there are 12 different balls.

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How do you calculate the number of combinations of numbers?

You can use the following combination formula that will allow you to determine the number of combinations in no time: C (n,r) = n!/ (r! (n-r)!),

How many combinations can you make with a set of 3 balls?

Let’s take a simpler example where you choose three balls called R (red), B (blue), G (green). There are six permutations of this set (the order of letters determine the order of the selected balls): RBG, RGB, BRG, BGR, GRB, GBR, and the combination definition says that there is only one combination!