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# The number of purchased bike since Covid-19

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 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!

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 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)

• Date ascending
• Date descending

Hi there,

It's actually too complex!

You can't break down population by age segment, and then apply a flat # to the whole pop who can ride/want to ride etc.!

The whole point of segmenting is to then apply a % + frequency to those very segments!

The other problem, is you broke it down too much. Why would you go from "Can use a bike" to "Would use a bike" to "actually have a bike" to "just bought a bike"? Rather, you just need to estimate % without a bike pre-covid AND % of those who would THEN change their minds and go buy a bike. Split THIS by population segment...that's it!

Finally, can you make a reasonable estimate between age groups 21-30 and 31-40? Probably not...just go young, middle-aged, and elderly!

So, remember, break things down into logical segments from which you can actually make reasonable assumptions!

Final final point: sense check your final number...24,000 for a pop of 5million is most definitely way too small...

Hi there,

It's actually too complex!

You can't break down population by age segment, and then apply a flat # to the whole pop who can ride/want to ride etc.!

The whole point of segmenting is to then apply a % + frequency to those very segments!

The other problem, is you broke it down too much. Why would you go from "Can use a bike" to "Would use a bike" to "actually have a bike" to "just bought a bike"? Rather, you just need to estimate % without a bike pre-covid AND % of those who would THEN change their minds and go buy a bike. Split THIS by population segment...that's it!

Finally, can you make a reasonable estimate between age groups 21-30 and 31-40? Probably not...just go young, middle-aged, and elderly!

So, remember, break things down into logical segments from which you can actually make reasonable assumptions!

Final final point: sense check your final number...24,000 for a pop of 5million is most definitely way too small...

Bike rides? Bikes sold?

Bike rides? Bikes sold?

Hi, in addition to the solutions proposed by the other coaches in the discussion, I would like to suggest similar cases in the platform to practice with:

Hope it helps,
Antonello

Hi, in addition to the solutions proposed by the other coaches in the discussion, I would like to suggest similar cases in the platform to practice with:

Hope it helps,
Antonello

## Related BootCamp article(s)

### Important Facts

It's essential to know some key figures regarding geographies, population, economies for your case interviews. We summarized them for you here.

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