Table of Contents
- 1 How many 7 digit numbers are there if repetition is not allowed?
- 2 How many 7 digit number can be written in which all the digits are different?
- 3 How many combinations can be made with 7 numbers?
- 4 What is a 7 digit phone number?
- 5 How many ways can you make 7?
- 6 How much is a 7-digit number?
- 7 How is the 4th digit of a phone number chosen?
- 8 How to calculate the number of possible phone numbers?
- 9 How many digits can be used in a permutation?
How many 7 digit numbers are there if repetition is not allowed?
For the third place we have 8 options to choose from 0 to 9 excluding the digits we already placed on first and second positions. Hence the answer appears. Also there will be 6∗6∗5∗4∗3∗2∗1=4320 seven digit numbers having the digits 0,1,2,3,4,5,6 giving minimum sum as 21.
How many 7 digit number can be written in which all the digits are different?
=n×(n−1)! Therefore, the number of different seven-digit numbers that can be written using only three digits 1,2 and 3 is 672. Thus, option (A) is the correct answer.
How many combinations can be made with 7 numbers?
127
The number of combinations that are possible with 7 numbers is 127.
How many 7 number combinations are there with 49 numbers?
85,900,584
Answer and Explanation: The number of 7 number combinations between 1 and 49 is 85,900,584.
Can a 7 digit phone number start with 0?
The 10 digits used for local calls (AAA XXX XXXX or 0AA XXX XXXX) consist of a 3 digit area/type code (the first digit in the area/type code is a trunk prefix) followed by 7 digits. All area codes, including mobile numbers, start with a “0” (trunk prefix) for domestic calls.
What is a 7 digit phone number?
Unsourced material may be challenged and removed. Seven-digit dialing is a telephone dialing procedure customary in the territories of the North American Numbering Plan, for dialing telephone numbers in the local calling area. The procedure is also sometimes known as local format or network format.
How many ways can you make 7?
eight different ways
We found eight different ways to make the number seven.
How much is a 7-digit number?
When we talk about 7-digit numbers, we mean the place values up to 1,000,000 or 10,00,000.
How many ways can you choose 7 numbers out of 45?
Divide 503417376000 by 5040 to account for this, to get 99884400. In other words, there are 5040 different ways that the 7 numbers you choose can be filled out on your lottery ticket–if you choose your 7 numbers correctly, any of these ways will make a winning ticket. Now, lottery odds can be pretty incomprehensible.
How many 6 digit telephone numbers are possible?
Because there are no more restrictions for phone numbers that don’t work (first digit can’t be one or zero was the only restriction), the question then becomes : How many 6 digit numbers are possible (000000) can count , well we know that the biggest 6 digit number is 999999 and the smallest is 000000. That means there are 999999–0000
How is the 4th digit of a phone number chosen?
The 4th digit is chosen from the remaining 7 numbers. The 5th digit is chosen from the remaining 6 numbers. The 6th digit is chosen from the remaining 5 numbers. The 7th digit is chosen from the remaining 4 numbers.
How to calculate the number of possible phone numbers?
Then the set of all possible phone numbers is B × A 6, and therefore the number of possible phone numbers is | B × A 6 | = | B | | A 6 | = | B | | A | 6 = 8 ⋅ 10 6.
How many digits can be used in a permutation?
This is a permutation as order is important. The first digit must be chosen from eight digits (there are 10 digits and since zero and one cannot be used that leaves us the choice of eight end parenthesis. Since repetitions are allowed the rest of the digits can be chosen from the 10 digits.