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If the sum the first 11 terms of an arithmetic progression equals that of the first 19 terms, then the sum of first 30 terms will be
66th [RE] BPSC
0
-1
1
0
If S = ∑(2n+(1/2)), n=(1 to 10), then S is
64th BPSC
55
111
115
None of the above
