A certain model of laptop comuter is priced at `$550` at a local electronics store. The same model laptop at an online retailer4 sells for `9/10` of the electronics store's price. At a luxury department store, the same model laptop sell for `7/5` of the electronics store's price. How many dollars mre is the cost of the laptop at the luxury department store than at the online retailer ?

Options

A. 198
B. 220
C. 275
D. 495

Answer

C

Explanation

The price of the laptop at the electronics store is `$550.` You also know that the price at the online retailer is `9/10` of this, so that price is `9/10 xx $550=$495.` The eqestion also states that the price at the luxury store is `7/5` of the price at the electronics store, so that's `7/5 xx$550= $770.` Therefore, the difference between the price at teh luxury department store and the price at the online retailer is `$770-$495=$275.`