­If a book is selected at random from a shelf in the library, what is the probability that it is on portfolio management

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­If a book is selected at random from a shelf in the library, what is the probability that it is on portfolio management?

1) The probability of selecting of a book not on portfolio management book is \(7/9\)

2) There are four portfolio management books on that shelf.

OA A
Source: — Data Sufficiency |