Hi! Since the pandemic of Covid-19, I noticed that the number of bike has increased significantly.

What if there is a question like this? "What is the number of purchased bike since Covid-19 in X?"

This is my estimation, please correct me!

Population of X= 10 M

Age population probably buy a bike due to Covid-19

21-30, 31-40, 41-50, 51-60 = 5 M

the number of people that can ride a bike = 60% x 5 M = 3 M

the number of people that would use a bike = 10% x 3 M = 300.000

the number of people who have a bike = 80% x 300.000 = 240.000

the number of people who just bought the bike = 10% x 240.000 = 24.000

so, the number of purchased bike since Covid-19 is 24.000 bicycles.

I do not know if this correct or not. Is it to simple? Is it MECE or not?

I also does not have any reason why I chose that percentage :( please help!

I will be having an interview in the upcoming days so I am currently trying to guess a market sizing that might be aligned with todays situation. If you have any suggestion of any market sizing case that I should ace before the interview, please let me know!

(edited)