Average & Number Series

The general formula for the average work done can be calculated using the formula $\displaystyle \sum_{i=1}^n \frac{F_i}{i}$ , where $F_n$ denotes the $n$ th Fibbonacci number.

So, average work done in $10$ days is $\displaystyle \sum_{i=1}^{10} \frac{F_{10}}{10}=\dfrac{1+1+2+\cdots+55}{10}=\dfrac{143}{10}=\boxed{14.3}$