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## #1 2015-04-17 05:32:54

husnain
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From: Chichawatni,Pakistan
Registered: 2014-10-03
Posts: 8,129
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### Total Percentage Discount:

Question:
The cost of servicing of a Maruti car at Maruti care PVT. Ltd. is Rs. 400. Manager of service centre told me that for the second service within a year a customer can avail a 10% discount and further for third and fourth servicing he can avail 10% discount of the previous amount paid, within a year. Further if a customer gets more than 4 services within a year, he has to pay just 60% of the servicing charges on these services. A customer availed 5 services from the same servicing station, what is the total percentage discount fetched by the customer?

Option A):
18.5%
Option B):
26%
Option C):
19.42%
Option D):
17.6%

Correct Answer is Option C):
19.42%

Explanation:
100 ==10%&#8595; (1st disc.)==> 90 ==10%&#8595;==> 81 == 10%&#8595;==> 72.9 ==10%&#8595;==> 60(After 5th discount.)

Alternatively,
Amount paid in 1st service = 100 (Assume)
Amount paid in 2nd service = 90
Amount paid in 3rd service = 81
Amount paid in 4th service = 72.9
Amount paid in 5th service = 60
Total amount paid,
= (100 +90 +81 +72.9 +60) = 403.9
Total Discount = 500 - 403.9 = 96.1
% Discount = (96.1 *100) /500 = 19.42%.

You cannot discover the new oceans unless you have the courage to lose the sight of the shore.

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