On Thursday, 4 out of the first 10 students who ate a school lunch chose spaghetti. Based on this information, if 640 students ate a school lunch on Thursday, how many students could be expected to have chosen spaghetti?

In a school cafeteria, the ratio of students who prefer pizza to those who prefer sandwiches is 3:2. If there are 150 students in total, how many students prefer sandwiches

In the school cafeteria, students choose their lunch from 3 sandwiches, 3 soups, 4 salads, and 2 drinks. How many different lunches are possible for a student who chooses exactly 1 sandwich, 1 soup, 1 salad, and 1 drink?Statistics Probability Combinations and Permutations

Among 50 sandwiches made for the birthday party 28 had tomatoes, 17 had olives and 15 had onions. 10 had tomatoes and olives, 8 had tomatoes and onions, 4 had olives and onions. None of the sandwiches had all three options. Find the number of sandwiches with tomatoes or onions but without olives

In preparation for a picnic, Ernesto made a salad with 1/2 of a bag of iceberg lettuce and 2/3 of a bag of Romaine lettuce. How many bags of lettuce did Ernesto use in all?Write your answer as a fraction or as a whole or mixed number.

At a popular salad bar, customers can choose from iceberg lettuce, romaine lettuce, or spinach. Yesterday, 413 customers made a salad at the salad bar. 3 times as many people chose iceberg lettuce as chose spinach. The same number of customers chose romaine lettuce as chose iceberg lettuce.How many customers chose iceberg lettuce for their salad yesterday?