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Question

The price of shirts at Sahara Ganj is defined as Rs. (100 + 10x2), where x is the number of shirts. Mallika purchased 5 shirts from the above shop. The average price of a shirt is :
  1. Rs. 50
  2. Rs. 70
  3. Rs. 75
  4. none of these


Solution

The correct option is B Rs. 70
Total price of 5 shirts = Rs [100 + 10 ×(5)2] = Rs. 350
Hence, the average price =3505=Rs.70

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