Have you ever gone out to organize a group barbecue? More than 40 people in our class want to go out for a barbecue. How much meat and vegetables should we buy?
There are about 30 kilograms of meat and vegetables. If there are many kinds, two or three kilograms of each kind will be almost the same. Specifically, you should add and subtract together according to your food intake. Going out for barbecue is mainly for fun, and it is inconvenient to bring too much. We have more than 50 friends together, but all of them eat less!