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Five digit numbers are formed using the digits $1, 2, 3,5, 7$ with repetitions and are written in descending order with serial numbers. For example, the number $77777$ has serial number $1$ .Then the serial number of $35337$ is
Option: 1
1436

Option: 2
-

Option: 3
-

Option: 4
-

Answers (1)

best_answer

Number starting with $37=37$ $=125$
Number starting with $357=3577$ $=25$
Number starting with $355=355_{-}=25$
Number starting with $3537=3537-=5$
Number starting with $3535=3535-=5$
Number starting with $\frac{35337}{\text { Total }=1436}=1$

Therefore, the serial number of $\mathrm{35337 \: is \: 1436}$

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