How many 3 digit numbers can be formed using 0-9 without repetition?
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Answered by
22
Since the first digit can't be 0 to make a 3-digit number,
The number of ways of filling the first digit = 9 ways (i.e. 1,2,3,...9)
The number of ways of filling the second digit = 9 ways (since there is no repitition)
The number of ways of filling the third digit = 8 ways
So, The required answer is 9x9x8 = 648 numbers
The number of ways of filling the first digit = 9 ways (i.e. 1,2,3,...9)
The number of ways of filling the second digit = 9 ways (since there is no repitition)
The number of ways of filling the third digit = 8 ways
So, The required answer is 9x9x8 = 648 numbers
Answered by
1
Answer:
1000 three digit numbers can be formed
Step-by-step explanation:
10 * 10 * 10 =1000
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