Fun with numbers! (Part-2)
Probability
Level
2
How many 7 digit Natural numbers are there which satisfy the given set of constraints
- The number should not contain the digit 0 .
- The number should be divisible by 3 .
- Repetition of digits within the number is allowed (any digit can be used any number of times)
The answer is 1594323.
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1 solution
simply we can put any digit as first 6 numbers but the last no has only 3 possibilities left(since no should not contain 0) . {9^6}*(3)