Final answer:
The total number of books in both libraries is 122,075. The senior library has 25,129 more books than the junior library.
Step-by-step explanation:
To find the total number of books in both libraries, we can add the number of books in the junior library and the number of books in the senior library:
48,473 + 73,602 = 122,075.
The total number of books in both libraries is 122,075.
To find out how many more books the senior library has than the junior library, we can subtract the number of books in the junior library from the number of books in the senior library:
73,602 - 48,473 = 25,129.
The senior library has 25,129 more books than the junior library.