$00$:$28$:$56$

Question $\frac{9}{13}$

For the determination of copper $(Cu)$ in fuels, students A and $B$ got the following data by an atomic absorption method: Based on the data In the above table onty, the Relative Standard Deviation $($RSD$)$ for data of student $B$ is

$\backslash$table$[[,$STUDENTA,,STUDENTB,$],[0514,$TRIAL NUMBER,$\backslash$table$[[Cu$