What is the new average of price per kg:

The average price per kg of rice at 10 different places was  4.85. After a week, the price per kg was increased by 20 paisa at 3 places and decreased by 10 paisa at one place.

  1. 4.88
  2. 4.86
  3. 4.90
  4. 5.35
Anurag Mishra Professor Asked on 7th January 2016 in Maths.
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  • 1 Answer(s)

    Answer: (3) 4.90

    Solution:-
    Let price at each place be Rs. X
    then total price = 10 X = 48.5
    The price at 3 places = (X + 0.2)
    Total price at 3 places = (3 X + 0.6)
    The price at 1 places = (X – 0.2)
    The price at remaining 6 places =Xx
    Total price at 6 places = 6 X
    New average = [3 X + 0.6 + X – 0.2 + 6 X]/10
    = [10 X + 0.4]/10
    = [48.5 + 0.4]/10
    = Rs 4.89

    Hence, the correct answer is option (3) 4.90

    Anurag Mishra Professor Answered on 9th January 2016.
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