Multiple choice

In a society, there were a total of ten families. A survey was conducted, and it was found out that the average spending of all those ten families on a yearly basis was \$35,000. If six out of the ten families had an average spending of \$40,000 each, then what was the average spending of the other four families on a yearly basis?

  1. $25,000
  2. $27,500
  3. $30,000
  4. $32,500
  5. $35,000
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total spending = 10 * 35,000 = 350,000. Spending of 6 families = 6 * 40,000 = 240,000. Remaining spending = 350,000 - 240,000 = 110,000. Average of 4 families = 110,000 / 4 = 27,500.

AI explanation

The total spending of all ten families is 10 times 35000, which equals 350000. The combined spending of the six families is 6 times 40000, which equals 240000. The spending of the remaining four families is 350000 - 240000 = 110000. Using the basic average formula, their average spending is 110000 / 4, which equals $27,500.

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