Calculating Mean and Missing Ages

The video tutorial addresses a problem in a babysitting log where one child's age is obscured by ink. The narrator explains how to use the mean age of six children to find the missing age. By understanding the calculation of the mean and applying it to the known ages, the missing age is determined to be three. The tutorial provides a step-by-step guide to solving the problem using basic arithmetic and logical reasoning.

What was the main issue faced in the babysitting business scenario?

• An age was obscured by ink.

• The mean age was incorrect.

• A child was missing.

• The log was lost.

Why was the mean age important in solving the problem?

• It was used to calculate the total ages.

• It helped identify the missing child.

• It was needed to verify the ages.

• It provided a clue to the missing age.

What is the formula for calculating the mean?

• Total ages divided by the number of children.

• Total ages plus the number of children.

• Product of ages divided by the mean.

• Sum of ages minus the number of children.

How do you find the total of ages using the mean?

• Divide the mean by the number of ages.

• Subtract the mean from the number of ages.

• Add the mean to the number of ages.

• Multiply the mean by the number of ages.

What was the total of the known ages before finding the missing age?

• 24

• 14

• 18

• 21

What operation was performed to isolate the missing age?

• Multiplication

• Subtraction

• Addition

• Division

What was the missing age that was calculated?

• Five

• Three

• Four

• Two

What was the final step in confirming the missing age?

• Rechecking the log

• Adding to the total

• Recalculating the mean

• Subtracting from the total

What was the mean age of the children?

• Four

• Three

• Six

• Five

What was the reaction after solving the problem?

• Indifference

• Excitement

• Confusion

• Disappointment