If 56Pr+6:54Pr+3 = 30800:1, then r =
31
41
51
40
56!(50−r)!×(51−r)!54!
= 308001⇒56×55×(51−r) = 30800⇒r = 41
If 56Pr+6:54Pr+3=30800:1, then r = 41
If 56Pr+6.54Pr+3 = 30800:1, then r =