Multiple choice

The average weight of 10 parcels is 1.7 kg. Addition of another new parcel reduces the average weight by 60 grams. What is the weight (in kg) of the new parcel?

  1. 1.04

  2. 1.08

  3. 1.4

  4. 1.8
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Total weight of 10 parcels = 10 * 1.7 = 17 kg. Let weight of new parcel be x. New average = (17 + x) / 11 = 1.7 - 0.06 = 1.64. 17 + x = 11 * 1.64 = 18.04. x = 18.04 - 17 = 1.04 kg.

AI explanation

The total weight of the initial 10 parcels is 10 multiplied by 1.7, which equals 17 kg. The new average weight becomes 1.7 kg minus 0.060 kg, which is 1.64 kg. For 11 parcels, the new total weight is 11 multiplied by 1.64, equaling 18.04 kg. The weight of the new parcel is the difference between the new total and the old total, so 18.04 minus 17 equals 1.04 kg.

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