hard · GMAT Quant
A library classifies its collection into four genres: Fiction, Non-Fiction, Biography, and Reference, in a 4:3:2:1 ratio. The probability of an item being checked out on a specific day is 0.10 for Fiction, 0.05 for Non-Fiction, 0.20 for Biography, and 0.01 for Reference. An item is checked out, and it is known the item was not a Biography.
What is the probability it was a Fiction book?
- dfrac4056
- dfrac4096
- dfrac25
- dfrac23
- dfrac110
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