Siping home appliance store has 240 TV sets of various brands, 15 more than refrigerators. How many refrigerators does the store have?

240 △ 1 + 15, = 240 △ 65, = 200 (sets). A: the store has 200 refrigerators

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1. The number of color TV sets purchased by Hongguang Electric Appliance Store is 3 times more than that of refrigerator, 2 sets more than that of refrigerator, and 90 sets of shower, 4.5 times more than that of color TV sets How many color TV sets and refrigerators do you want to buy?
2. In order to welcome the activities of home appliances going to the countryside, Xinhua shopping mall sells a certain kind of refrigerator. The purchase price of each refrigerator is 2500 yuan. Market research shows that when the sales price is set at 2900 yuan, an average of 8 refrigerators can be sold every day; when the sales price is reduced by 50 yuan, an average of 4 more refrigerators can be sold every day. (1) how much should the price of each refrigerator be if the shopping mall wants to make the average sales profit of this kind of refrigerator reach 4800 yuan every day ？ How many refrigerators can be sold per day? (2) Is 4800 yuan a day the biggest profit? If not, try to find out the highest profit when the price of each refrigerator is RMB, and what is the highest profit?
3. (2) If the average price of home appliances is: 1500 yuan for each color TV set, 1500 yuan for each refrigerator, 2000 yuan for each refrigerator, 800 yuan for each mobile phone, it is known
4. In response to the national call of "home appliances to the countryside", a refrigerator factory plans to produce 100 refrigerators of a and B models. According to the budget, after all the refrigerators are sold out The profit can be no less than 47500 yuan and no more than 48000 yuan,
5. Market research shows that when the selling price is 2900 yuan, an average of 8 refrigerators can be sold every day; when the selling price is reduced by 50 yuan, an average of 4 more refrigerators can be sold every day; how many yuan should the selling price be reduced to make the average profit of this refrigerator reach 5000 yuan every day?
6. Market research shows that when the selling price is 2900 yuan, an average of 8 refrigerators can be sold every day; when the selling price is reduced by 50 yuan, an average of 4 more refrigerators can be sold every day; how many yuan should the selling price be reduced to make the average profit of this refrigerator reach 5000 yuan every day?
7. The market research shows that when the selling price is 2900 yuan, an average of 8 refrigerators will be sold every day. When the selling price is reduced by 50 yuan, an average of 4 refrigerators will be sold every day. If the selling price is 2700 yuan, how many refrigerators will be sold every day? How many units can be sold in a day at this time? If the selling price is x yuan (x ≤ 2900), how many refrigerators can be sold in one day?
8. Market research shows that when the selling price is 2900 yuan, an average of 8 refrigerators can be sold every day; when the selling price is reduced by 50 yuan, an average of 4 more refrigerators can be sold every day; how many yuan should the selling price be reduced to make the average profit of this refrigerator reach 5000 yuan every day?
9. A supermarket sells a batch of refrigerators with a purchase price of 2500 yuan. When the sales price is set at 3500 yuan, an average of 8 refrigerators are sold every day, and for every 100 yuan reduction in the sales unit price of refrigerators, an average of 2 more refrigerators are sold every day. In order to sell more refrigerators and increase the daily profit by 1000 yuan, what is the daily preferential price?
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