5.2.1.1.1 - Direct Method
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Practice Questions
Test your understanding with targeted questions
What is the arithmetic mean of the following numbers: 10, 20, 30?
💡 Hint: Add the numbers together and divide by how many numbers there are.
Calculate the mean of 5, 15, and 25.
💡 Hint: Count the total and divide by the count.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the arithmetic mean formula?
💡 Hint: Remember, it’s about summing and dividing.
True or False: The arithmetic mean can be affected by extreme values.
💡 Hint: Think about how a very high or low score impacts the average.
1 more question available
Challenge Problems
Push your limits with advanced challenges
In a survey, five different people reported the amount of time they spend reading per week: 10, 25, 20, 15, and 30 hours. How much should another participant contribute to ensure that the new average reading time becomes 20 hours?
💡 Hint: Calculate the total hours needed and subtract the current total.
A teacher calculated that the average test score of 12 students was 75. If one student’s score was omitted, resulting in an average of 72, find the omitted score.
💡 Hint: Use the average formulas to express the omitted score.
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