Zhong Bai Supermarket offers the following preferential schemes: (1) No discount for one-time shopping 100 yuan. (2) If the one-time shopping exceeds 100 yuan, but does not exceed 300 yuan, a 10% discount will be given. (3) 20% discount for one-time shopping in 300 yuan. Someone paid 80 yuan and 252 yuan for shopping twice. If he buys the goods he bought twice at a time, he should pay ().

288 RMB 322 RMB

C.288 yuan or 3 16 yuan D.332 yuan or 363 yuan.

Misunderstanding that someone pays for their first shopping in 80 yuan, and it does not exceed 100 yuan, and there is no discount. Pay 252 yuan for the second shopping, and enjoy a 10% discount between100 and 300 yuan. Shopping price 252 ÷ 0.9 = 280 yuan.

So the value of his two purchases is 80+280 = 360 yuan. If he buys once, he will enjoy a 20% discount for 300 yuan and above, and the payable amount is 360× 0.8 = 288 yuan. Choose a.

In understanding the rules of enjoying the discount, some people subjectively limit the second shopping payment to 252 yuan, which is paid after enjoying a 10% discount. Without considering that it may be caused by a 20% discount. At this time, the price is 252 ÷ 0.8 = 3 15 yuan, the value of two purchases is 80+3 15 = 395 yuan, and the one-time purchase only needs to pay 395 × 0.8 = 3 16 yuan, so C.

This is an analysis process, I hope it will help you ~