me thinks B as well and here's how
6 quarters, 5 dimes and 10 nickels. If she were to pick 1 coin, the probability of it being a quarter is 6 / 21 ~ .28
Assume the first coin was a dime or a nickel. Now she picks one more coin and the resulting probability for a quarter is 6 / 20 = .3
Since they are discrete events, adding the 2 probabilities, yields 0.28 + 0.3 which is a little more than 50%. Is that the OA?
Gamecode - what is the source of this question? I'm trying to work on some Probability / combinations type problems and would appreciate a pointer to any good source. Thanks!
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