In a class, there are 20 boys and their total score in a test is 810 marks. If the average score of the girls is 37 and that of the whole class is 39, Calculate the; a)Number of students in the class b)Ratio of the total marks of girls to that of boys​

good job you smart son of a gun you are smarter that einstein. 7

a.) list the factors of 40.

1/2/4/5/8/10/20/40

b.) list the factors of 40 that represent the number of cans that could be on each shelf.

5

c.) how many different arrangements of cans are possible?

just one because if you put more on one shelf you will go way over 40 and the cabinet will probably break.

d.) what are the possible arrangements of the cans?

put 5 cans on each self to reach 40 cans in total.

e.) which arrangement uses all the shelves?

5 because you can put 5 cans on each shelf, and since there are 8 shelfs you are equally going to get 40 cans.