Final answer:
The number of red blood cells is approximately 663.27 times greater than the number of white blood cells, aligning with option B: 663.26 times.
Step-by-step explanation:
To calculate how many times greater the number of red blood cells is than the number of white blood cells in the human body, we need to divide the number of red blood cells by the number of white blood cells.
Number of red blood cells: 2.6 x 10^13
Number of white blood cells: 3.92 x 10^10
Ratio = 2.6 x 10^13 ÷ 3.92 x 10^10 = 663.26530612244897959183673469388
When rounded to two decimal places, the number of red blood cells is approximately 663.27 times greater than the number of white blood cells. This corresponds to option B: 663.26 times.