Schedule mock interviews on the Meeting Board, join the latest community discussions in our Consulting Q&A and find like-minded Interview Partners to connect and practice with!
Back to overview

Is the solution wrong?

Market share is 5%.The answer is:Revenues Year 3 = Revenue (filters) + Revenue (air purifiers)Revenue (filters) = ([installed purifiers at end of year 2] * [2 filters] X [price/filter]) + ([additional installed purifiers in year 3] X [average of 1 filter X price/filter])Installed purifiers by end of year 2 = [sales of purifiers in year 1] + [sales of purifiers in year 2]= 0.5M*5% + 0.5M*5%*1.1= 0.025M + 0.0275M = 0.0525MPurifiers sold in year 3 = 0.5M X 5% X 1.12 = 0.03M Revenue (filters) = (0.0525M*2*$450) + (0.03M*1*$450) = $47M + $13.5M = $60.5MRevenue (air purifiers) = 0.5M X 1.12 X 0.05 * $3715 = $112.4M Total sales = $60.5M + $112.4M = $173MFor Revenue from Filters= They multipled the number of purifiers sold by 2 for the first 2 years, and for the third year, they only multiplied by once.My rationale: Why not multiply by 4 and 2 respectively?Given the fillers replacement= every 6 months. Wouldn’t that be twice per year?Do you also find the answer wrong? 
Market share is 5%.
The answer is:
Revenues Year 3 = Revenue (filters) + Revenue (air purifiers)
Revenue (filters) = ([installed purifiers at end of year 2] * [2 filters] X [price/filter]) + ([additional installed purifiers in year 3] X [average of 1 filter X price/filter])
Installed purifiers by end of year 2 = [sales of purifiers in year 1] + [sales of purifiers in year 2]
= 0.5M*5% + 0.5M*5%*1.1
= 0.025M + 0.0275M = 0.0525M
Purifiers sold in year 3 = 0.5M X 5% X 1.12 = 0.03M Revenue (filters) = (0.0525M*2*$450) + (0.03M*1*$450) = $47M + $13.5M = $60.5M
Revenue (air purifiers) = 0.5M X 1.12 X 0.05 * $3715 = $112.4M Total sales = $60.5M + $112.4M = $173M

For Revenue from Filters
= They multipled the number of purifiers sold by 2 for the first 2 years, and for the third year, they only multiplied by once.

My rationale: Why not multiply by 4 and 2 respectively?
Given the fillers replacement= every 6 months. 
Wouldn’t that be twice per year?

Do you also find the answer wrong?
 
2
600+
8
Be the first to answer!
Nobody has responded to this question yet.
Top answer
Ian
Coach
on Feb 07, 2023
Top US BCG / MBB Coach - 5,000 sessions |Tech, Platinion, Big 4 | 9/9 personal interviews passed | 95% candidate success

Hi there,

I actually do agree with you. However, I would have to see the case to see exactly how the problem is set up.

They're getting a bit “cute” with their definition of a year. Ultimately, if this is a case though, you'll  need to take the guidance of the interviewer.

Hagen
Coach
on Feb 07, 2023
#1 recommended coach | >95% success rate | 8+ years consulting, 8+ years coaching and 7+ years interviewing experience

Hi there,

Yes, you seem to be correct. However, given this is only a snapshot of a case study, it is hard to determine with certainty.

If you would like a more detailed discussion on how to best prepare for your upcoming interviews, please don't hesitate to contact me directly.

Best,

Hagen

Similar Questions
Consulting
What is your Answer?
on Feb 08, 2023
Global
3
800+
Top answer by
#1 rated McKinsey Coach | top MBB coach
14
3 Answers
800+ Views