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?



Answer :

Well, the first coin has chance [tex]\frac{20}{29}[/tex] 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 [tex]\frac{19}{28}[/tex] chance for the second one to be a penny. The result is [tex]\frac{20*19}{29*28}[/tex], which is [tex]\frac{95}{203}[/tex], or about 46.80% (rounded to the first 2 decimals)

Answer:

9 dimes

Step-by-step explanation:

th fountai contains more that wat u would think but u mist move

Other Questions