Sherlock has a well-shuffled complete deck of cards. John has a bucket with 300 glass marbles in it. 100 of the marbles have

Question

Sherlock has a well-shuffled complete deck of cards. John has a bucket with 300
glass marbles in it. 100 of the marbles have 'spots, the rest of the marbles are one of
the solid colors blue or green or black or white.
If Sherlock picks one card at random from his deck and John picks one marble at
random from his bucket, the two events are independent of each other, and
probabilities multiply.
What is the probability that Sherlock gets a card and John gets a marble?

Kunduz · Accepted Answer

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