math

Melissa has 10 coins in her pocket.
2 quarters
3 dimes
4 nickel
1 penny

What is the theoretical probability of pulling a quarter out of your pocket, putting it back, then pulling out a penn?

My answer is 1/50

Also what is the theoretical probability of pulling a nickel out of your pocket, spending it, than pulling the penny out of your pocket?

My answer is 1/45

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asked by Kyle
  1. Your first answer is correct.

    the second:
    prob(nickel, then penny)
    = (4/10)(1/9)
    = 4/90
    = 2/45

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    posted by Reiny

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