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bonanova
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The marbles in John's collection were of 13 different colors; each marble was of a single color.

His sisters, Jane and Joanne, especially liked the red ones, and asked if they might have one each.

Feeling generous, but not wanting to give them everything they asked, John let them each take

one marble from the black velvet bag where he kept his collection, but he did not let them look inside.

It is an even money bet that both sisters got their wish and pulled out a red marble.

How many red marbles might have been in John's collection before his sisters chose?

Edit: Of the 13 possible colors, obviously some were red. There may have been zero of some of the other 12 colors.

Edited by bonanova
clarify the color distribution possibilitites
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