If 56Pr + 6 : 54Pr + 3 = 30800 : 1 then the value of r is ? – McqOptions

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1.	If ⁵⁶P_{r + 6} : ⁵⁴P_{r + 3} = 30800 : 1 then the value of r is ?
A.	40
B.	41
C.	42
D.	None of these
Answer» C. 42

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