1.

1). 2602). 3003). 2804). 220

Answer»

The SUM of ‘n’ terms of an A.P. is given as,

Sum = (n/2) × (first term + last term)

Given, n = 12

First term = 3

Last term = 47

∴ Sum of 12 terms of A.P. = (12/2) × (3 + 47) = 6 × 50 = 300



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