Asked by Anonymous

A jar contains 25 green and 17 purple marbles. A marble is drawn at random.

P(not a 23). Answer 17/42

Answers

Answered by Steve
correct
Answered by Steve
assuming that what was meant is that the jar contains ONLY green and purple marbles . . .

I think we can say that, but it's also possible that other marbles were not mentioned.

Read Heinlein's Stranger in a Strange Land. One of the characters is a professional observer. He reports exactly what he sees. If you point to a house and ask what color it is, he'd say, "This side is white," making no assumptions about the unseen sides (if any).
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