In a quiz, 2 students scored 1, 5 scored 2, 2 scored 3 and 1 scored 4. What is the mean score?
Answer and explanation
Correct answer: B. 2.2
- Step 1: Total score: . Step 2. There are 10 students, so the mean is . Answer: 2.2. Why not the others: 2.5 is the mean of the four possible scores 1 to 4, 5.5 divides the total by 4 instead of by the 10 students, and 2 is the mode.
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