KingMathWorking out a mean
The mean of five marks.
🔍 Step 1 · Understand
First, look at a worked example
Sam's marks out of 20 are: 9 ; 17 ; 16 ; 17 ; 16. What is the mean?
💡 The tip : Add up all the marks, then divide by the number of marks.
🤔 Find the answer in your head, then open the solution.
👀 See the solution✅ The solution
Answer: 15
Total of the marks: 75. 75 ÷ 5 = 15.
🎯 Step 2 · Your turn!
10 questions. Take your time, and ask for a hint if you get stuck.