An employee invests ₹ $x$ at the rate of $5 \%$ and invests ₹ $y$ at the rate of $7 \%$,then he gets ₹ $310$ as yearly interest. Symbolically it is written as ..........

  • A
    $5x + 7y = 310$
  • B
    $7x + 5y = 3100$
  • C
    $5x + 7y = 31000$
  • D
    $7x + 5y = 310$

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