Mathematics, 18.08.2019 20:00, fluffyanimal456
The fountain contains 20 pennies and 9 dimes. a coin is randomly taken and not replaced. a second coin is randomly taken. what is the probability that both coins are pennies?
Answers: 1
to be a penny. When it is a penny, the only valid case (the other case gives 0 for the multiplications later, so it is ignored) gives 
chance for the second one to be a penny. The result is 
, which is 
, or about 46.80% (rounded to the first 2 decimals)
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The fountain contains 20 pennies and 9 dimes. a coin is randomly taken and not replaced. a second co...
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