Find the range of 4,9,6,3,2,8,10 and 11

Analyze the question

The range of a data set is the difference between the highest value and the lowest value.

Concept

Range = Highest value − Lowest value

Solution

Data: 4, 9, 6, 3, 2, 8, 10, 11

Arrange in order: 2, 3, 4, 6, 8, 9, 10, 11

• Highest value = 11
• Lowest value = 2

Range = 11 − 2 = 9

Answer

The range is 9, which matches option B.

Tip

Don't confuse the range with the highest number (that is how option A tempts you). Always subtract the smallest from the largest. Sorting the numbers first helps you spot the extremes quickly and avoid mistakes.