Multiple choice

The average of five numbers is $40$ and the average of another six numbers is $50$. The average of all numbers taken together is _______.

  1. $44.44$
  2. $45.00$
  3. $45.45$
  4. $90.00$
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C Correct answer
Explanation

The total sum of the first five numbers is 5 * 40 = 200. The sum of the next six is 6 * 50 = 300. The total sum is 500 for 11 numbers. The average is 500 / 11 = 45.4545...

AI explanation

The sum of the first five numbers is 5 multiplied by 40 = 200, and the sum of the other six numbers is 6 multiplied by 50 = 300. The combined sum of all eleven numbers is 200 + 300 = 500. Dividing this combined sum by 11 gives the final average of 500 / 11 = 45.45.

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