Question
यदि $^{56}{P_{r + 6}}{:^{54}}{P_{r + 3}} = 30800:1$, तो $r = $
$ = \frac{{30800}}{1} \Rightarrow 56 \times 55 \times (51 - r) = 30800$
$ \Rightarrow $$r = 41$.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.