What is the probability that a randomly selected reference book is hardcover? 0.25 0.4 0.6 0.75

0.4

Step-by-step explanation:

 The correct option is (B) 0.4.

Step-by-step explanation:  We are given to find the probability that a randomly selected reference book is hardcover.

Let, S denote the sample space for the experiment of selecting a book.

Then, n(S) = 60.

Let A denote the event that the selected book is is a reference one and B denote the event that the selected book is a hardcover.

Then, according to the given information, we have

So,

Therefore, the probability that a randomly selected reference book is hardcover is equal to the conditional probability of event B given A.

That is, the required probability is

Option (B) is correct.

i think 5 miles per hour

step-by-step explanation:

i don't know, but that looks pretty bad. my school passed us unless we failed in all the subjects, but idk abt ur school's rules.

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