CAT Exam Model Paper 1 with solutions for free online practice

As a strategy towards retention of customers, the service centre of a split AC machine manufacturer offers discount as per the following rule—for the second service in a year, the customer can avail of a 10% discount, for the third and fourth service within a year, the customer can avail of 11% and 12% discounts respectively of the previous amount paid.
Finally, if a customer gets more than four services within a year, he has to pay just 55% of the original servicing charges. If Rohan has availed 5 services from the same service centre in a given year, the total percentage discount availed by him is approximately.