How many four digit numbers can be formed using the digits 3,4,0,1 only once in a number
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Step-by-step explanation:
- Total there are 4 digits, from which we have to form 4 digits number.
- We need to choose 4 digits randomly and form a number without repeating any digit.
- In this process, we need to determine the number of possibilities where order does not matter.
So, we use the permutation formula and that is
where n is the total number of objects and r is the number of objects taken at a time.
Given:
- n = 4 and r = 4
∴ In 24 ways the 4-digits numbers can be form using the digits 3,4,0,1
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