Estimation - Number of ATMs in India
Product Management Interview: Guess estimate the total number of ATMs in India
Known: The population of India - 1.3 Billion
Assumption - Let the Rural : Urban split be 70 : 30 % of the total population.
Population Split -
Therefore, the population split approximately comes to,
Rural = 900 Million
Urban = 400 Million
Household Split -
Next, we will calculate the number of Households in India,
Assuming, there are 4 people in a household for both urban and rural,
(Ideally, we would assume, 3 for Urban and 5 for Rural)
Household split come to,
Rural = (900 Million / 4) = 230 Million
Urban = (400 Million / 4) = 100 Million
Total number of ATM cardholders in India -
Next, let’s estimate the total number of ATM cardholders in India,
70% of Rural household has ATM cards and,
90% of Urban Households has ATM cards
This comes down to, (70% of 230 Million)
= 160 Million ATM cards in Rural and (90% of 100 Million)
= 90 Million ATM cards in Urban.
Now, let’s assume -
In Urban, let say 10% of household has 2 ATMs and rest of the 90% has 1 ATM,
= (10% * 90M)*2 + (90% * 90M)*1= 18 + 81 M = ~ 100M ATM users
In Rural, let say 100% of household has 1 ATMs,
= (100% * 160M)*1 = 160 M ATM users
1 ATM is mapped to ~500 users in the Urban area, & ~2000 users in Rural area
Total number of ATMs in Urban + Rural India =
= 100M/500 + 160M/2000
= 2,00,000 + 80,000
= 2,80,000 ATMs are there in India.
The actual number of ATMs in India is around ~2,40,000
Practice More: List of all Guess-Estimation questions
To help you with your Product Manager interview preparations, we have compiled a complete list of the most asked Product Management Interview Questions and Answers at companies like Facebook, Google, Amazon, Microsoft, Netflix, etc. answered by PMs at FAANG.
Now get, Full Access to All PM Interview Questions and Detailed Answers by FAANG PMs for a Year! Get the Yearly Subscription now! 👇
Preferred Payment Methods:
Google Pay / PhonePe at UPI Id - mypminterview@oksbi
Paypal at email@example.com
Once done, email us the payment receipt at firstname.lastname@example.org
Product Improvement Questions: 6 Things to Remember while Answering [FREE]
How would you go about designing a new location-sharing app for Google?
Design an app for the California’s Department of Motor Vehicles
Common Mistakes in Answering Product Design Questions [~FREE]
How to Answer Behavioral Interview Screening Questions? [FREE]
Describe your day-to-day activities as a Product Manager [FREE]
Behavioral Interview Questions - Storytelling Framework [FREE]
What's the one thing that excites you the most about Product Management?
How do you take product decisions involving multiple stakeholders with consent?
How do you use research & data to guide your day-to-day decisions?
What tools do you use in your day-to-day activities as a Product Manager?
How would you keep developers in your team motivated to turn out quality work?
Tell me about a time you had to make a decision to make short-term sacrifices for long-term gains.
How will you manage a team where team members are more experienced than you?
Which apps do you use on your cellphone on a daily basis and why? [FREE]
How much storage space do you need to store all the information from Google maps?
Estimate the Number of WhatsApp Chats occurring in India [FREE]
Estimate the Number of Hours spent on Smart Phones by all Indians
Estimate the Number of Golf balls that can fit in a School Bus
Estimate the Number of Tennis balls you can fit in an Aircraft
Estimate the Number of Refrigerators sold in India every year
Estimate the storage space is required to host all the images of Google Street View
Estimate the Number of Queries Answered by Google per Second
Common Mistakes to avoid while Answering Estimation Questions
How would you evaluate the success of Reactions on Facebook?
How would you evaluate the success of Instagram Stories? [FREE]
Common Mistakes to avoid while Answering Product Metrics Questions
Junglee Games - Product Manager Interview Experience. [FREE]
Product Execution: Uber Product Manager Interview - Increase in Cancel Rates
What would you do if there is a High Acquisition but Low Retention?
Common Mistakes to avoid while Answering Product Manager Problem-Solving Questions
Which channels would you use to increase top-of-the-funnel activities for Duolingo?
What are some alternative uses for chopsticks besides eating?
Common Mistakes to avoid while Answering Product Strategy Questions
Business Case Studies [FREE]
There is an error in the line "In Rural, let say 10% of household has 1 ATMs", instead of 10% it should say 100%.