Ap Eapcet
Permutations And Combinations
AP EAPCET 2024 - 20th May Morning Shift
MCQ+1 / -02024
If $a_n=\sum\limits_{r=0}^n \frac{1}{{ }^n C_r}$, then $\sum\limits_{r=0}^n \frac{r}{{ }^n C_r}=$
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