1. How-to books make up 0.3 of the books in the school library. Of these how-to books, 0.2 deal with carpentry and 0.4 deal with electronics.
To find the number of how-to books in the school library that deal with carpentry, multiply the total number of how-to books by the proportion that deal with carpentry:
0.3 x 0.2 = 0.06.
Similarly, to find the number of how-to books in the school library that deal with electronics, multiply the total number of how-to books by the proportion that deal with electronics:
0.3 x 0.4 = 0.12.
Therefore, there are 0.06 carpentry how-to books and 0.12 electronics how-to books in the school library.
To determine the number of how-to books, carpentry books, and electronics books in the school library, we can follow these steps:
Step 1: Calculate the total number of how-to books in the library.
Given that how-to books make up 0.3 of the total books, we can calculate the number of how-to books as follows:
Total number of books × 0.3
Step 2: Calculate the number of carpentry books.
Given that 0.2 of the how-to books deal with carpentry, we can calculate the number of carpentry books as follows:
Number of how-to books × 0.2
Step 3: Calculate the number of electronics books.
Given that 0.4 of the how-to books deal with electronics, we can calculate the number of electronics books as follows:
Number of how-to books × 0.4
By following these steps, we can determine the number of how-to books, carpentry books, and electronics books in the school library.