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The average annual income (in Rs) of certain agricultural workers is S and that of other workers is T. The number of agricultural workers is 11 times that of other workers. Then, the average annual income (in Rs) of all the workers is(a) \(\frac{S+11T}{12}\)(b) \(\frac{S+T}{2}\)(c) \(\frac{11S+T}{12}\)(d) \(\frac{1}{11S}+T\) |
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Answer» Answer is: (c) Let the number of other workers = x Then, the number of agricultural workers = 11x ∴ Total income of other workers = Rs Tx Total income of agricultural workers = Rs 11Sx ∴ Average income of all the workers = \(\frac{11Sx + Tx}{11x +x}=\frac{x(11S+T)}{12x}=\frac{11S+T}{12}\) |
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