Correct Answer:
B. A range of cells from A20 to A31
The correct answer is A range of cells from A20 to A31.
- Explanation: In Microsoft Excel, the colon (:) operator is used to define a range of cells. When you see 'A20:A31', it refers to all the cells starting from cell A20 and extending down to cell A31, encompassing every cell in column A between those two points, inclusively.
- Why other options are false:
- A (A single cell): A single cell would be referenced as 'A20' or 'A31'.
- C (A formula to calculate average): A formula always begins with an equals sign (=), for example, '=AVERAGE(A20:A31)'.
- D (A specific column labeled A20 and A31): This notation refers to a contiguous block of cells within a single column, not two separate columns or labels.