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Mathematics 25 Online
OpenStudy (reagan18):

A boy has in his pocket a 50-cent piece, two dimes and two pennies. If he pulls out a coin at random, what is the probability it is worth at least ten cents?

OpenStudy (royalranger):

Again?

OpenStudy (reagan18):

yeah im trying is it 2/5 @royalranger

OpenStudy (reagan18):

wait did i do this problem already?

OpenStudy (reagan18):

@royalranger can you help me with probability and percentages?

OpenStudy (royalranger):

How many coins are worth at least 10 cents?

OpenStudy (reagan18):

1 dime

OpenStudy (reagan18):

oh its 1/5 ohhhh

OpenStudy (reagan18):

Two cards are drawn at random from a standard deck of 52 cards, without replacement. What is the probability that both cards drawn are hearts? (There are 13 hearts in a standard deck of cards.)

OpenStudy (reagan18):

can you help me with this?

OpenStudy (royalranger):

Its not 1/5. It asks you how many coins are worth AT LEAST 10 cents? Well there are 2 dimes, those are worth at least 10 cents. And the 50 cent coin is worth more than 10 cents. So we have a total of 3 coins that are worth at least 10 cents.

OpenStudy (reagan18):

oh im stupid @royalranger thanks

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