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FINDING THE MEAN (AVERAGE) A mean of a group of numbers is the average of those numbers. Here is an example. David has taken three Math tests so far this year. He received a 92% on his first test, a 90% on his second test, and an 85% on his third test. Let’s find the average or mean of David’s 3 test scores. Here is what you need to do. First, add the 3 tests scores together. 92 90 + 85 267 Next, count the number of tests scores there are. There are 3 test scores. Now, divide the total 267 by 3. 89 3 267 -24 27 -27 0 Now you have a solution The mean of David’s test scores = 89%. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.

You Try Jamie also took three Math tests so far this year. She received a 91% on her first test, a 93% on her second test, and a 95% on her third test. What is the mean of Jamie’s three test scores? a] 90% b] 91% c] 93% d] 89% If you answered c] 93%, you’re right! (You should have added the THREE test scores and then divided that sum by THREE.) © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.