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  • Let 5 digit numbers be constructed using the digits 0,2,3,4,7,9 with repetition allowed, and are  arranged in ascending order with serial numbers. Then the serial number of the number 42923 is

Let 5 digit numbers be constructed using the digits 0,2,3,4,7,9 with repetition allowed, and are  arranged in ascending order with serial numbers. Then the serial number of the number 42923 is

Option: 1

2997


Option: 2

3010


Option: 3

2100


Option: 4

1520


Answers (1)

best_answer
    2         \bar{6}       \bar{6}         \bar{6}    

 \bar{6}=1296
3 \bar{6} \bar{6} \bar{6}

                           \bar{6}=1296
4 0

 \bar{6}

  \bar{6} \bar{6}=216

4

 2 0    \bar{6} \bar{6}=36
4 2 2

 \bar{6}

 \bar{6}=36
4 2 3

\bar{6}  

 \bar{6}=36
4 2 4

  \bar{6}

 \bar{6}=36
4 2 7

\bar{6}

 \bar{6}=36
4 2 9 0

\bar{6}=6
4 2 9 2

\underline{0}=1
4 2 9

2

 \underline{2}=1
4

2

 9 2

\underline{3}=\frac{1}{2997}

 

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