Multiple choice

A dealer mixes 6 kg of tea having a rate of \$15 per kg with 4 kg of tea costing \$20 per kg. What is the average rate of the mixture?

  1. $3.5
  2. $17.5
  3. $17
  4. $25
  5. $125
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total cost = (6 * 15) + (4 * 20) = 90 + 80 = 170. Total weight = 6 + 4 = 10 kg. Average rate = 170 / 10 = 17.

AI explanation

Using the weighted average formula, the total cost is calculated as (6 multiplied by 15) plus (4 multiplied by 20), resulting in 90 plus 80. The sum of 170 is then divided by the total weight of 10 kg to get an average rate of $17 per kg.

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