Total fine on 4th day
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The solution is as follows
1st Day : - 0.10$ as per the given condition.
2nd Day: - Now it has either to be doubled or to be added 0.30$ whichever is leeser. In this case the amount to added to double is 0.10$ which is less than 0.30$, so the total fine on 2nd day is 0.20$
3rd Day: - Following the same concept it has either to be doubled or to be added 0.30$ whichever is leeser. In this case the amount to added to double is 0.20$ which is less than 0.30$ , so the total fine on 3rd day is 0.40$
4th Day: -Following the same concept it has either to be doubled or to be added 0.30$ whichever is leeser. In this case the amount to added to double is 0.40$ which is greater than than 0.30$ , so the total fine on 4th day is 0.70$
The right answer is 0.70$
Hope this clears your doubt.
1st Day : - 0.10$ as per the given condition.
2nd Day: - Now it has either to be doubled or to be added 0.30$ whichever is leeser. In this case the amount to added to double is 0.10$ which is less than 0.30$, so the total fine on 2nd day is 0.20$
3rd Day: - Following the same concept it has either to be doubled or to be added 0.30$ whichever is leeser. In this case the amount to added to double is 0.20$ which is less than 0.30$ , so the total fine on 3rd day is 0.40$
4th Day: -Following the same concept it has either to be doubled or to be added 0.30$ whichever is leeser. In this case the amount to added to double is 0.40$ which is greater than than 0.30$ , so the total fine on 4th day is 0.70$
The right answer is 0.70$
Hope this clears your doubt.