An electronic store owner allows two discounts of 15% and 20% on each item. As an incentive, if the net payments after the discounts is above ₹30,000, the customer gets an additional discount of 4%. the store also has a scheme of reward points credited to the customer’s account on previous purchases from the store. This enables a customer to get free shopping to get free shopping worth ₹0.25 on every 1 reward point earned. A customer decides to buy a hot water geyser that is marked at ₹48,000. What will be its net selling price (in ₹) for him if he has 1680 reward points to his credit on the previous purchases from this store?

Correct option is D

Given:

Marked price of water geyser =₹48,000

Two successive discounts = 15% and 20%

Additional discount if net price is above ₹30,000 = 4%​​

Reward points customer had from previous purchases = 1680

Worth of every reward point = ₹0.25

Formula Used:

​$$Successive\ Discount = D_{1}+D_{2} - \frac{D_{1}D_{2}}{100}$$​​

​$$SP = MP \times \frac{(100-D)}{100}$$ 

Solution:

​$$Successive\ Discount = 15+20 - \frac{(15)(20)}{100}$$​​

​$$= 35 - 3 =32\%$$​​

​$$SP = 48000 \frac{(100-32)}{100}$$​​

​$$= ₹32,640$$​​

Price is above ₹30,000 so additional 4% is applied:

​$$Net \ Price = 32,640 \times \frac{(100-4)}{100}$$​​

​$$= ₹31,334.4$$​​

Reward points = 1680

Worth of every reward point = ₹0.25 = ₹$$\frac{1}{4}$$​​

Total worth of 1680 reward points =$$₹\frac{1}{4}\times 1680 = ₹420$$​​

Final payable amount = ₹31,334.4 - ₹420 = ₹30,914.4