test series

Question

Gate Fever asked Oct 29, 2018

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1 Answer

Utkarsh+Joshi

did you pinged message ? or just comment message ? — Shaik Masthan, Oct 29, 2018
nice approach Shaik Masthan

make your answer as best answer! — Gate Fever, Oct 30, 2018

Gate Fever · Answer 1 · 2018-10-30T01:05:55+0000

D is fixed right ; it will be first in each sequence right!!

so now we are left with 6 positions;

and we know that BAC , FEG are left and they should come in this order only

so take any 3 positions out of 6 ,that can be done in ⁶C₃

now in BAC order of A,C can be changed and in FEG order of E,G can be changed

so ⁶C₃ * 2! * 2!

therefore 80