Question

The average of eight numbers is 56. When one of the numbers was left out, the mean decreased to 54. What number was left out?

Answer 1

The number that was left out is 70.

What is the number that was left out?

Average is the sum of a set of numbers divided by the total numbers in the data set.

Average = sum of numbers / total numbers

• Sum of numbers when there are 8 numbers = 56 x 8 = 448
• Sum of numbers when there are 7 numbers = 54 x 7 = 378
• Difference = 448 - 378 = 70

To learn more about average, please check: brainly.com/question/25842202

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