# How do you make all combinations of an array?

## How do you make all combinations of an array?

Given an array of size n, generate and print all possible combinations of r elements in array. For example, if input array is {1, 2, 3, 4} and r is 2, then output should be {1, 2}, {1, 3}, {1, 4}, {2, 3}, {2, 4} and {3, 4}.

## How do you generate all possible combinations of one list?

Select a cell in your list and then go to the Data tab and select the From Table/Range command in the Get & Transform Data section….This can be any text or number, just make sure it’s the same in both list queries.

1. Give your new column a name.
2. Add a constant to the Custom column formula.
3. Press the OK button.

## How do you make a JavaScript combination?

Approach 1:

1. Get the all arrays in an array.
2. Recursion is used to solve the problem. The base condition is, When the length of the array reduces to zero then return the string build till now.
3. Reduce the first array element by .
4. Return the final ans array, which contains the all combinations.

## How do you find all possible combinations?

The formula for combinations is generally n! / (r! (n — r)!), where n is the total number of possibilities to start and r is the number of selections made.

479001600

## What is the formula for calculating permutations?

One could say that a permutation is an ordered combination. The number of permutations of n objects taken r at a time is determined by the following formula: P(n,r)=n! (nār)!

120

24

127

## How do you calculate the number of possible combinations?

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 total number of items, and r represents the number of items being chosen at a time.

## How many 10 digit combinations are there?

If repetition is allowed, then the number of permutations of 10 digits is 10,000,000,000.

## What is a 7 digit number called?

A 7-digit number is read as millions or ten-lakhs.

10,00,000

## How many is 7 digits?

7-digit numbers range from 1,000,000 to 9,999,999.

## How many unique 7 digit numbers are there?

So total number of 7 digit numbers=9999999 ā 1000000+1). Out of 9000000 numbers, 4500000 are having the sum of digits as even and the remaining 4500000 are having the sum of digits as odd. Every alternate number has its sum of digits even and odd. There are 9000000 seven digit numbers.

## How many 6 digit numbers are there in all?

Answer: There are 9,00,000 6-digit numbers in all. In the 6-digit numbers, the highest place value is 1,00,000 which has a unique name in the Indian numeral system ā a lakh. Explanation: To find the total number of 6-digit numbers, let’s first find the smallest and the largest 6-digit number.

## How many different phone numbers are possible?

Well, this could turn out to be a simple permutation problem: you have ten number choices (0-9) for each digit of a phone number and repetitions are allowed. Technically, there could be as many as \begin{align*}10^{10} = 10,000,000,000\end{align*}, or 10 billion possible phone numbers in the U.S.

1 is the code for the US, Canada, and several islands. Why we share a single country code goes back to the early telephone systems. Because the caller ID was sent in full global (international) form. The + means this; the 1 is the country code for the US, Canada, and the rest of the North American Numbering Plan.

## Are there any 555 numbers?

555 was an exchange combination that was not used very often in the American telephone system. 555-1212 is still used for directory assistance and 555-4334 is reserved for assigned national use. But a set of 100 555 numbers have been officially designated for use in Hollywood, 555-0100 through 555-0199.

## How many combinations of 3 numbers are there?

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 combinations of 3 numbers can you make with 5 numbers?

10 possible combinations

100

## What are the 5 luckiest numbers?

Luckiest Lotto Max Numbers

• 39 being drawn on 2.49% of all draws.
• 19 and 38 on 2.29% of all draws.
• 18 and 44 on 2.27% of all draws.
• 28, 1, 15, 22 and 24 on 2.24% of all draws.

## What are the 7 lucky numbers?

They are: 3, 7, 13, 31, 37, 43, 67, 73, 79, 127, 151, 163, 193, 211, 223, 241, 283, 307, 331, 349, 367, 409, 421, 433, 463, 487, 541, 577, 601, 613, 619, 631, 643, 673, 727, 739, 769, 787, 823, 883, 937, 991, 997, (sequence A031157 in the OEIS). It has been conjectured that there are infinitely many lucky primes.

## What Pick 4 number wins the most?

The odds of matching all four numbers in the exact order in a Pick 4 drawing are 1 in 10,000. The numbers 1-0-1-0 are one of the most popular combinations of numbers played in the Pick 4 game. The record Pick 4 win occurred on Aug. 11, 2012 when the numbers 1-1-1-1 paid out \$7.5 million in prizes.

## What are the 6 luckiest numbers?

When it comes to Powerball, the six lucky numbers are 23, 32, 61, 64, 69, and 62.

## What is the lucky number for 2020?

If you are waiting for good luck in the year 2020, you can depend on the numbers like 1, 5, 8, 22, 29, 33, and 44 considering the planetary positions above. Astrology suggests that the numbers 7, 10, 18, 21, 24, 36, and 59 will be lucky ones for you during the year 2020 considering the planetary orientation.

## What are the top 10 luckiest numbers?

The top 10 are: 11, 7, 17, 27,19, 23, 12,13, 9 and 18. So how do you pick lucky numbers? For those who use birthdays, five of the most commonly drawn numbers are more than 31, meaning they are not likely to have picked them.

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