If \[^{56}{{P}_{r+6}}{{:}^{54}}{{P}_{r+3}}=30800:1\], then \[r=\] [Roorkee 1983; Kurukshetra CEE 1998]

If \[^{56}{{P}_{r+6}}{{:}^{54}}{{P}_{r+3}}=30800:1\], then \[r=\] [R

1.	If \[^{56}{{P}_{r+6}}{{:}^{54}}{{P}_{r+3}}=30800:1\], then \[r=\] [Roorkee 1983; Kurukshetra CEE 1998]
A.	31
B.	41
C.	51
D.	None of these
Answer» C. 51

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If \[^{56}{{P}_{r+6}}{{:}^{54}}{{P}_{r+3}}=30800:1\], then \[r=\] [Roorkee 1983; Kurukshetra CEE 1998]

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