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Discussion

  1. The average consumption of petrol for a car for seven months is 110 litres and for next five months it is 86 litres. The average monthly consumption is ?
    1. 96 litres
    2. 98 litres
    3. 100 litres
    4. 102 litres
  1. Correct Option: C

    Average = ( sum of consumption of petrol in first 7 months + sum of consumption of petrol in last 5 months. ) / 12

    Average = ( 110 x 7 + 86 x 5 ) / 12
    =(1200 / 12 = 100 liters

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