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Lorico [155]
2 years ago
7

In a school election, 2/5 of the 30 candidates are girls and the rest are boys. How many candidates are boys?

Mathematics
2 answers:
Marianna [84]2 years ago
7 0
This should solve this problem

MrMuchimi2 years ago
3 0
Answer: 18

explanation: 30 split into 5 groups have 6 people in each. And 3 groups of 6 is 18. :) hope this helped
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Now, we have to find a value of T, which is found looking at the t table, with 15 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.7531

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The lower end of the interval is the sample mean subtracted by M. So it is 23.29 - 0.34 = 22.95 mpg

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The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

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