Discover interview question

If we undertake a campaign to contact our 30 day overdue group of customers, what is our overall probability of success given the following probabilities: 50% chance of having their e-mail on file 20% chance of a customer paying their bill without us contacting them 30% chance of a customer reading the e-mail we send them 30% chance of a customer making a payment if they read the e-mail etc.

Interview Answers

Anonymous

21 Oct 2009

Use a decision tree.

2

Anonymous

12 Feb 2016

^That method won't work because it's possible that there are those on the email list that would respond without an email, so there would be some overlap, which means you can't just add the two together. Easiest way to approach it would be to draw some sort of Venn Diagram

Anonymous

19 July 2013

this is likely an applied probability question: My answer is to apply total probability formula here.

Anonymous

23 Aug 2015

It's ~25%. .5 x .3 x .3 = .045 or 4.5% success rate from emailing. Add to that the unprompted payment rate (.2 or 20%) and get 24.5%

1