# Question: How Many Combinations Of 7 Items Are There?

## How many combinations of 7 numbers are there?

Assuming repetition is allowed, you can have 7-digit numbers from 1,000,000 to 9,999,999 which is a total of 9,000,000 7-digit numbers.

These are all the possible 7-digit numbers.

In general, there are 9 × 10^(n-1) possible n-digit numbers..

## How many 10 digit combinations are there?

9,999,999,999If you have 10 digits then the maximum number possible is: 9,999,999,999. Since the sequence starts at 0 we need to add 1. So 10,000,000,000 (10 billion). That is how many numbers can be represented in 10 digits, it is not the number of phone numbers possible.

## How many combinations of 5 items are there?

In total you will find 5 × 24 = 120 possibilities.

## How many combinations of 6 colors are there?

In other words, there are 6! = 720 different arrangements for these six colors. So, the number of combinations is 720 / 720 = 1.

## How many combinations of 100 numbers are there?

Given 100, choose 99, there are 100 combinations. Given 100, choose 98, there are 161,700 combinations. The number of combinations gets bigger fast. 100, choose 95, is over 7 million combinations.

## How many combinations are there for ABCD?

four combinationsThere are only four combinations (ABC, ABD, ACD, and BCD).

## What is a 7 digit number called?

The smallest 7-digit number is 1 followed by 6 zeros. This number is called one million. The largest 7-digit number is 9 followed by another 6 nines. This number is called nine million nine hundred ninety-nine thousand nine hundred ninety-nine.

## What is nPr formula?

nPr(n, r) The number of possibilities for choosing an ordered set of r objects (a permutation) from a total of n objects. Definition: nPr(n,r) = n! / (n-r)! nCr(n, r)

## How many 11 digit combinations are there?

99 combinations2! See for 11 numbers there can be 9 ways for each number for 1st nine places since 0 can’t be the fist number and next two are repeated from 10 numbers hence 10!/2! So 99 combinations have 10!/2! Permutations hence total ways are 99*10!/2!

## How many permutations of 4 are there?

256 permutationsIn the first position we have 4 number options, so like before place a “4” in the first blank. Since we are allowed to reuse numbers, we now have 4 number options available for the second digit, third digit, and fourth digit as well. By allowing numbers to be repeated, we end up with 256 permutations!

## How many combinations can you make with 6 items?

720 possible combinationsWith 1 item there are 6 possibilities with 2 you only have 5 choices after the first if you don’t repeat the same item. So for 6 items the equation is as follows 6*5*4*3*2= 720 possible combinations of 6 items.

## How many combinations of 3 numbers are there?

720There 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.

## How many combinations of 8 items are there?

With 8 items on your menu, the number of possible combinations will be 28 = 256. And if you bought all 8 items, and tried to arrange them in different orders on your tray, the number of arrangements (‘permutations’) would be 8! = 40320.

## How many combinations of 20 numbers are there?

1,048,575The number of combinations that are possible with 20 numbers is 1,048,575.

## How do you calculate possible combinations?

Remember that combinations are a way to calculate the total outcomes of an event where order of the outcomes does not matter. To calculate combinations, we will use the formula nCr = n! / r! * (n – r)!, where n represents the number of items, and r represents the number of items being chosen at a time.

## How many combinations of 4 items are there?

You multiply these choices together to get your result: 4 x 3 x 2 (x 1) = 24. Combinations and permutations are often confused by students – they are related, but they mean different things and can lead to totally different interpretations of situations and questions.

## How many combinations of 12 items are there?

x2x1=479001600. This number is called “twelve factorial” and written 12!, so, for example 4!= 4x3x2x1=24.