Question

In a survey of college students it was found that 40% use their own books, 50% use library books, 30% use borrowed books, 20% use both their own books and library books, 15% use their own books and borrowed books, 10% use library books and borrowed books, and 4% use their own books, library

books and borrowed books. Calculate the percentage of students who do not use a book at all.​

Answer 1

Answer:

answer is 21%

Step-by-step explanation:

plzz mark as a brainlist.