1.

n bitstrings aremadebyfillingthedigits0 or1 . Thenumberof stringin whichthereare exactlykzeroswithnotwo '0' s consecutive is

Answer»

`""^((n-k))C_k`
`""^((n-k+1))C_k`
`""^((n-k-1))C_k`
none

Answer :B


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