To estimate the number of runners in the London Marathon on 25th April, 2010, whose birthday was on that day, we can use the fact that approximately 1/365th of the population has their birthday on any given day (assuming a non-leap year). This estimation assumes an even distribution of birthdays throughout the year.
Estimated number of runners with birthday on 25th April, 2010 = (1/365) * 37527
Let's calculate this:
Estimated number of runners = (1/365) * 37527
Estimated number of runners ≈ 102.89
Therefore, we can estimate that approximately 103 runners in the London Marathon on 25th April, 2010, had their birthday on that day.