What is the probability that a randomly chosen 4 digit number contains no repeated digits?

To have no repeated digits, all four digits would have to be different, which is selecting without replacement. We could either compute 10 · 9 · 8 · 7, or notice that this is the same as the permutation 10P4 = 5040. Hence, there is a 50.4\% chance that the 4-digit PIN has no repeated digits.

What is the probability of the number being a multiple of 5?

R D Sharma – Mathematics 9 The local tennis club needed new tennis balls. To pay for all the new balls, each person in the club donated $12.45. The total bill for the new balls … came to a total of $510.

What is 4 digit OTP code?

One-time Passwords (OTP) is a password that is valid for only one login session or transaction in a computer or a digital device. Now a days OTP’s are used in almost every service like Internet Banking, online transactions, etc. They are generally combination of 4 or 6 numeric digits or a 6-digit alphanumeric.

What is the probability the number chosen contains at least one digit?

The desired set E of the numbers required should have at least on 2 in them. 12,20,21,22,23,24,25,26,27,28,29, 32,42,52,62,72,82 and 92. These are 18 in number. So, n (E) = 18. Hence the probability the number chosen contains at least one digit that is 2 is 1/5. A number between 1 and 10 is chosen at random.

What is the chance of getting a 4 digit number?

A specific “4 digit number” would have 1/9000 chance, since there are 9000 4 digit numbers (1000-9999).

How many numbers are there in a 4-digit number?

There are 4 numbers (any number from 0-9) in a 4-digit number. There are 9000 four digit numbers in all.

What is the probability that my Number is 4109?

Your colleague is right. If your digits are randomly and independently selected (assuming equal likelihood for each digit), the chance that your number is 4109 is nothing more complicated than: all multiplied together. That’s ( 1 / 10) 4, as your colleague says. Where would permutations come into it?