Math Problem Solver

Original numbers in ascending order: $\frac{13}{20}$, $\frac{3}{4}$, $\frac{4}{5}$
Sum: $\frac{11}{5} \approx 2.2$
Mean: $\frac{11}{15} \approx 0.7333$
Sample standard deviation: $\frac{\sqrt{21}}{60} \approx 0.0764$
Median: $\frac{3}{4} = 0.75$
Mode: No mode