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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Alka gupta Best Answer
if we want to find total number of elements of order r then we have to find total possibility of L.C.M of r after that we will find total number of elements of order r . see this result by example
in solution i attached i forgot this red encircled part
mam, ans given is 240
yes ...I did small calculation mistake
your method is also correct....
mam..pls once tell if i have done it right..I tried by ur method
see
got it now mam...thanks a lot mam