The difference between a discount of 35% and two successive discounts of 20% on a certain bill was 22. Find the amount of the bill.

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

200

1100

2200

1000

answer is C.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Concept- First, it finds the specified 20% percentage streak discount and calculates the total bill after discount. Then calculate a 35% discount on the bill. Observe the difference between them and then use the unit method to find the amount charged. Start with the fact that the total invoice amount is x. Then find the amounts that correspond to two successive discounts of 20% and 20%, respectively. Also note that these discounts are related to the amount billed
Find the invoice amount after the first

discount on the invoice amount, and let the invoice amount be

This is because we need to determine the bill amount after the 20% discount on the total amount.
Question Image

Let's find the bill after the second

on the bill which is Rs. 80 now.
Question Image

Total discount

We go further and calculate a 35% discount on the total bill. This is 100.

the value of x using the unitary method. If the total invoice amount is 100, you can see that there is a difference of Rs. 1. Therefore, we need to find the value of x whose difference is Rs. twenty two
You can get the value of x using the unit method. This is because if the difference is 1, the invoice is 100. So if the difference is 22, the bill would be:
so we get

Hence, the correct answer is option (3) .

Watch 3-min video & get full concept clarity