# Lesson Worksheet: The Mean of a Data Set Mathematics • 6th Grade

In this worksheet, we will practice calculating the mean of a set of whole numbers or decimals.

Q1:

Which of the following data sets has a mean of 59?

• A52, 76, 23, 50, 15
• B81, 34, 85, 21, 76
• C74, 79, 27, 59, 56
• D90, 64, 49, 13, 50
• E11, 50, 21, 72, 48

Q2:

Noah has the following data: 18, , 11, 15.

If the mean is 13, find the value of .

Q3:

What is the mean of the following numbers: 6, 4, 5, 3, 5, 1?

Q4:

Find the mean of the values 15, 20, 37, 43, 13, 34, 41, and 39.

Q5:

Find the mean of the set of data in the line plot. If necessary, write your answer to the nearest tenth. Q6:

The mean of the given data set is 7. Find the missing value .

 9 6 3 8 5 𝑥

Q7:

Given that the mean of the marks of 9 students is 45, determine the sum of their marks.

Q8:

If the mean age of two people is 50 and one of the people is 54 years old, how old is the other person?

Q9:

The 6 most recent customers at a bookstore bought the following numbers of books: 3 books, 2 books, 2 books, 2 books, 4 books, and 5 books. What is the mean number of books bought?

Q10:

Table shows the distribution of the wages of 250 factory workers. Find the mean wage received.

 Wages in Pounds Number of Workers 10–19 20–29 30–39 40–49 50–59 60–69 49 32 𝑘 𝑘+5 50 34