3. On a table, there are 18 English books, 25 math books, 22 science books,
21 history books, and 14 social study books. If a professor selects the book
at random, what is the probability that it is a history book?
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Step-by-step explanation:
total no .of books is
18+25+22+14+21=100
probability of history book is 21/100=0.21
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