Three classes in grade seven donate books to hope primary school The number of books donated by class 2 is the average of the three classes. The number of books donated by class 3 is 40% of the total number of grades. How many books have the three classes donated?

Three classes donated x books. Class 2 donated X / 3. Class 3 donated 40% X
X-X/3-40%X=152
X* 4/11=152
X=418

RELATED INFORMATIONS

1. Class A, class B and class C donated books to the hope project. It is known that one person in class a donated 6 books, two people donated 7 books each, and the others donated 11 books each; one person in class B donated 6 books, three people donated 8 books each, and the others donated 10 books each; two people in class C donated 4 books each, six people donated 7 books each, and the others donated 9 books each How many students are there in each of the three classes?
2. There are three classes in Grade 6 contributing to the hope project. Class 6 (1) contributes 13% of the total. The ratio of class 6 (2) to class 6 (3) is 3:5. It is known that class 6 (3) donates 150 yuan more than Class 6 (1). How much is the total donation of the whole grade?
3. How many digits is the result of formula 2 (3 + 1) (32 + 1) (34 + 1) (38 + 1) (316 + 1) (332 + 1) + 1?
4. For the formula 2 (3 + 1) (32 + 1) (34 + 1) (38 + 1) (316 + 1) (332 + 1) + 1, do you know the number of digits it calculates
5. （1）23°30′=（）（2)13.6°=——°——′（3）52°32′-34°37′=( ) (4)38°43′+27°36′=——
6. The school divided 264 books into three classes in Grade 6, with 42 students in class 1, 46 students in class 2 and 44 students in class 3. How fair is the division? How many books are each divided into three classes
7. 1. The school lends 780 books to each class according to the ratio of the number of students in three classes of grade 6. There are 43 students in class 1, 42 students in class 2 and 45 students in class 3. How many books can each class borrow? 2. The perimeter of a rectangle is 5.6CM, and the ratio of length to width is 5:2. How many square centimeters is its area?
8. Some books are distributed according to the ratio of the number of students in three classes in grade six. There are 42 students in class one, 45 students in class two and 44 students in class three. Class two gets six more books than class one. How many books are there in all
9. The school allocated 524 books to each class according to the ratio of three classes in Grade 6. There were 42 students in class 1, 45 students in class 2 and 44 students in class 3. How many books should each class get?
10. The school allocated 536 books to each class according to the number of three classes in Grade 6. There are 45 students in class 1, 42 students in class 2 and 47 students in class 3. Each class should get more books There is another question that I hope primary schools can participate in tree planting activities. The ratio of trees planted in grade 4, 5 and 6 is 2:3:4. It is known that there are 84 more trees planted in Grade 6 than in grade 4. How many trees are planted in grade 4, 5 and 6?
11. In order to have a meaningful children's day, the experimental school launched an activity to donate books to a hope primary school, The number of students in class 2 is 1.2 times that of class 1. On average, each student in class 2 donated one more book than that of class 1;
12. There are three classes in grade three donating books to the school. Among them, 152 books were donated by class 1 of grade three. The number of books donated by class 2 of grade three is the average number of books donated by the three classes. The number of books donated by class 3 of grade three is 40% of the total number of books donated by the three classes?
13. There are 350 students in Grade 5 and grade 6 of the experimental primary school. The number of students in Grade 5 is three fourths of that in Grade 6. How many students are there in each grade?
14. There are 296 students in the sixth grade of experimental primary school, which is less than that in the fifth grade & nbsp; 19. How many students are there in the fifth grade? (solved by equation)
15. There are 330 students in Grade 5 and 6 of the experimental primary school, twice as many. How many students are there in each grade?
16. There are 930 students in Grade 5 and 6 of the experimental primary school. It is known that 3 / 4 of the students in Grade 5 are equal to 4 / 5 of the students in Grade 6. How many students are there in Grade 5 and 6? Worry. 3Q
17. There are 360 students in the fifth and sixth grades of the experimental primary school. The number of students in the fifth grade is 1.25 times that of the sixth grade. How many students are there in the fifth and sixth grades?
18. There are 180 students in the sixth grade of experimental primary school, among which the number of girls is 9 / 11 of that of boys. How many boys and girls are there in the sixth grade?
19. There are 120 girls in the sixth grade of Huipu experimental primary school, which is 2 / 5 of the number of sixth grade students. The number of sixth grade students is 4 / 15 of the number of the whole school. How many students are there in the primary school
20. There are 600 girls and 900 boys in an experimental primary school. How many boys are there? (using equation solution)