How to Find a Missing Value Using Mean

The video tutorial explains how to find a missing value using the mean. It presents a problem where the weights of seven packages are known, and the weight of an eighth package needs to be determined so that the mean weight of all eight packages is 12 pounds. The tutorial guides through setting up an equation with the known weights and solving it to find the weight of the eighth package, which is calculated to be 19 pounds.

What is the main goal of the problem discussed in the video?

• To find the total weight of all packages.

• To determine the weight of the eighth package.

• To calculate the average weight of seven packages.

• To find the heaviest package.

What is the mean weight of all eight packages supposed to be?

• 12 pounds

• 20 pounds

• 15 pounds

• 10 pounds

How do you calculate the mean of a set of numbers?

• Multiply all values together.

• Add all values and divide by the number of values.

• Subtract the smallest value from the largest.

• Divide the largest value by the smallest.

What is the first step in solving for the unknown weight in the equation?

• Divide both sides by 8.

• Subtract 77 from both sides.

• Multiply both sides by 8.

• Add 8 to both sides.

What is the weight of the eighth package?

• 10 pounds

• 19 pounds

• 15 pounds

• 12 pounds