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ehidna [41]
3 years ago
13

If Cody has 11 dimes and quarters in his pocket, and they have a combined value of 170 cents, how many of each coin does he have

?
Mathematics
1 answer:
postnew [5]3 years ago
5 0

Answer:

12 dimes and 2 quarters

Step-by-step explanation:

12 dimes is 120 cents and 2 quarters is 50 cents that perfectly gives us 170 cents. As worded if he has 11 Dimes and the rest is quarters and we want 170 cents then it's impossible. 11 dimes is going to be 110 cents plus 2 quarters is 160 cents or plus 3 quarters is going to be 185 cents. therefore you are either short or over the money.

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In a certain computer, the probability of a memory failure is 0.01, while the probability of a hard disk failure is 0.02. If the
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Step-by-step explanation:

For this case we can define the following events:

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We also know the probability that the memory and the hard drive fail simultaneously given by:

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And we want to check if the two events are independent.

We need to remember that we have independent events when a given event is not affected by previous events, and we can verify if two events are independnet with the following equation:

P(A \cap B) = P(A) *P(B)

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P(A) *P(B) = 0.01*0.02= 0.0002

And we see that 0.0002 \neq P(A \cap B)

So then we can conclude that the two events given are not independent and have a relationship or dependence.

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Answer:

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Step-by-step explanation:

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