Cost of $5$ apples and $3$ oranges is Rs. $35$. Cost of $2$ apples and $4$ oranges is Rs. $28$. Cost of $1$…

Cost of $5$ apples and $3$ oranges is Rs. $35$. Cost of $2$ apples and $4$ oranges is Rs. $28$. Cost of $1$ apple is
  1. Rs. $4$
  2. Rs. $5$
  3. Rs. $6$
  4. Rs. $3$

Solution

$5a + 3o = 35,\ 2a + 4o = 28$. Multiply first by 4: $20a + 12o = 140$. Multiply second by 3: $6a + 12o = 84$. Subtract: $14a = 56 \Rightarrow a = 4$.

Asked in: MH-SSC-9

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