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Jlenok [28]
3 years ago
13

At a math competition 2 students can answer 40 questions in 1 hour. At the same rate, how many questions could 5 students answer

in 15 mins?
Mathematics
1 answer:
const2013 [10]3 years ago
6 0

Answer:

25 questions

Step-by-step explanation:

At a math competition 2 students can answer 40 questions in 1 hour.

Therefore, 1 student can answer in 1 hour =  \frac{40}{2}

                                                                     = 20 questions

5 students can answer in 1 hour = 20 × 5 = 100 questions

60 minutes = 1 hour

15 minutes =  \frac{15}{60} = 0.25 hours

5 students can answer in 0.25 hours = 100 × 0.25

                                                              = 25 questions

5 students could answer 25 questions in 15 minutes.

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We need to find the 99% confidence interval for the population mean of high school students that take the bus to school everyday

A confidence interval is a range of estimates for an unknown parameter. The confidence interval is calculated at the specified confidence level; the most common is the 95% confidence level, but sometimes other levels are used, such as 90% or 99%.

The confidence interval of proportions is given by:

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<u>Learn more about confidence interval:</u>

brainly.com/question/28052710

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