Question

If Cost of 17 items is Rs. 306. Cost of 31 items -
(a) Rs. 855
(b) Rs. 588
(c) Rs. 558
(d) None of these​

Answer 1

let the cost of 1 article be x therefore

17x=306

x=18

cost of 31 articles=18*31=558

therefore (C) is correct

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