# Blue Marbles

You have 20 marbles–an equal amount of the following colors: red, blue, black, and gold–in a bag. You and seven friends each draw a marble out of the bag, and don’t put it back in the bag after drawing it out. Your friends all draw before you. Here is the results of those draws.

1: red, 2: blue, 3: blue, 4: black, 5: blue, 6: blue, 7: blue

What is the chance that the marble you draw out will be blue?

### 2 guesses to Blue Marbles

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• Sid

No chance.

• Dude

Correct, Sid!

0% chance you will draw a blue. Why? 20 marbles total, an equal amount of four colors (red, blue, gold, black). That would mean there were 5 of each color. 5 friends already drew and took out a blue, so there are no blues left in the bag. Therefore, there is a 0% chance you’ll draw a blue!

You’re today’s winner.