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A pocket contains pennies and dimes only, in the ratio 4:1, respective

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A pocket contains pennies and dimes only, in the ratio 4:1, respective  [#permalink]

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New post 13 Feb 2019, 08:21
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B
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Question Stats:

90% (00:30) correct 10% (00:53) wrong based on 31 sessions

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A pocket contains pennies and dimes only, in the ratio 4:1, respectively. If a coin is randomly selected from the pocket, what is the probability that it is a dime?

a. \(\frac{1}{8}\)
b. \(\frac{1}{5}\)
c. \(\frac{1}{4}\)
d. \(\frac{1}{2}\)
e. \(\frac{4}{1}\)

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Re: A pocket contains pennies and dimes only, in the ratio 4:1, respective  [#permalink]

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New post 13 Feb 2019, 10:46
PeepalTree wrote:
A pocket contains pennies and dimes only, in the ratio 4:1, respectively. If a coin is randomly selected from the pocket, what is the probability that it is a dime?

a. \(\frac{1}{8}\)
b. \(\frac{1}{5}\)
c. \(\frac{1}{4}\)
d. \(\frac{1}{2}\)
e. \(\frac{4}{1}\)


Let the number of pennies = 4 and the number of dimes =1. Then the total coins is 5 and the probability of drawing a dime is 1/5. The answer is B
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Re: A pocket contains pennies and dimes only, in the ratio 4:1, respective  [#permalink]

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New post 14 Feb 2019, 02:50
4 pennies and 1 dime.4+1=5coins
1/5
Ans B

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Re: A pocket contains pennies and dimes only, in the ratio 4:1, respective  [#permalink]

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New post 15 Feb 2019, 18:44
1
PeepalTree wrote:
A pocket contains pennies and dimes only, in the ratio 4:1, respectively. If a coin is randomly selected from the pocket, what is the probability that it is a dime?

a. \(\frac{1}{8}\)
b. \(\frac{1}{5}\)
c. \(\frac{1}{4}\)
d. \(\frac{1}{2}\)
e. \(\frac{4}{1}\)


Since the ratio of pennies to dimes is 4 : 1, the simplest case would be that there are 4 pennies and 1 dime. The probability of selecting a dime is 1/(1 + 4) = 1/5.

Answer: B
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Re: A pocket contains pennies and dimes only, in the ratio 4:1, respective   [#permalink] 15 Feb 2019, 18:44
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