Math, Physics and Chemistry books

Discrete Mathematics Level 1

On a table, there are a total of 30 distinct books: 9 math books, 10 physics books and 11 chemistry books.

What is the probability of getting a book that is not a math book?

\[1\] \[0\] \[ \frac{11}{30} \] \[ \frac{21}{30} \] \[ \frac{10}{30} \] \[ \frac{19}{30} \] \[ \frac{9}{30} \] \[ \frac{20}{30} \]

Excel in math and science