Aditya pulls one sock out of the drawer without looking. How many more white socks must he put into the drawer so that the chance of pulling out a white sock becomes 1/2?

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Accepted Answer

4. Now: 10 socks, 3 white. Add w white: 3+w/10+w = 12 6 + 2w = 10 + w w = 4 . Check: 7/14 = 12 . (Adding 2 forgets that the total grows too.)

Aditya pulls one sock out of the drawer without looking. How many more white socks must he put into the drawer so that the chance of pulling out a white sock becomes 1/2?

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