The price of each bottle of mineral water is 1.2 yuan. Now, a and B give preferential policies: 10% discount for all of a's shopping malls, and 20% discount for more than 20 bottles of B's shopping malls If you are a consumer, which shopping mall is more suitable?

The price of each bottle of mineral water is 1.2 yuan. Now, a and B give preferential policies: 10% discount for all of a's shopping malls, and 20% discount for more than 20 bottles of B's shopping malls If you are a consumer, which shopping mall is more suitable?

First, find out how many bottles of water to buy and spend the same money in the two shopping malls. Set the number of bottles of mineral water as a (a > 0) 1.2 * 0.9 * a = 1.2 * 20 + 1.2 * (A-20) * 0.8 a = 40. When a > 40, assume that a is 50, spend 1.2 * 0.9 * 50 = 63 yuan in the shopping mall, and spend 1.2 * 20 + 1.2 * in the shopping mall

Each ticket of an amusement park is 10 yuan, and group tickets for more than 18 people (including 18 people) are given a 20% discount. There are 16 tourists in a tour group. How much do they pay for each

20% discount for more than 18 people, 16 people group is not enough, they need 10 yuan per ticket, 16 people total 160 yuan

The group bought a park ticket for 1-50 people at 13 yuan, 51-100 people at 11 yuan, and more than 100 people at 9 yuan

OK, the first step: if you combine a group, you can pay 5040, so we can first calculate the total number of people in a group. 5040 / 65, 5040 / 55 results have decimals, and the number of people must be an integer. 5040 / 45 = 112, you can calculate the total number of 112 people. The second step is to set a x people b y people

The ticket price of group buying park tickets is as follows: the number of people buying tickets is 1-5051-100100, and the ticket price per person is 13119. There are two tour groups A and B. It is known that the number of people in group A is less than 50, and the number of people in group B is not more than 100. If they buy tickets separately, the total ticket fee payable is 1392 yuan. If they buy tickets together as a group, the total ticket fee payable is 1080 yuan (2) how many people are there in each group?

(1) Suppose that the number of group B is less than 50, then the number of group A and group B is less than 100. ∵ 1392 ﹣ 13 = 1071131080 ﹣ 11 = 98211, that is, 1392 is not a multiple of 13, 1080 is not a multiple of 11, ∵ the number of group B is not less than 50, not more than 100; (2) suppose that the number of group A and group B is x and Y respectively =(2) when the total number of group A and group B is more than 100, then 13X + 11y = 13929 (x + y) = 1080. The solution is: x = 36Y = 84. A: there are 36 and 84 people in group A and group B respectively