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Genrish500 [490]
3 years ago
8

An adult ticket costs $5.25 and a child ticket costs $3.05. If $498.60 were collected for 100 tickets, how many child tickets we

re sold?

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
6 0

Answer:

work is shown and pictured

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College freshmen took a psychology exam. If the mean is 80, the SD is 10, and the scores have normal distribution, what percent
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Answer:

  (a)  2%

Step-by-step explanation:

A score of 60 is 2 standard deviations below the mean (80 -2·10 = 60). The empirical rule tells you that 95% of the distribution is within 2 standard deviations of the mean. The remaining 5% is split evenly between those that are more than 2 SD above the mean and those that are more than 2 SD below the mean.

That tells you the percentage who failed is about 2.5%. The best answer choice is 2%.

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<em>Additional comment</em>

The empirical rule is a little bit sloppy, but it gets you in the ballpark. The actual percentage is closer to 2.275%.

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Jessica wrote 6 6 6 on the board. what is another way to show 6 6 6 6
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The number of handshakes is the number of ways 6 objects can be selected 2 at a time.

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The appropriate choice is

... C) 15


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Consider that each person can shake hands with 5 others. That's a total of 6*5 = 30 handshakes, but it counts both A shaking with B and B shaking with A. If each pair of persons only shakes hands once, the number of handshakes is 30/2 = 15.

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