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olga nikolaevna [1]
3 years ago
9

Sophie wants to determine if her seventh grade class wants to watch an action, horror, or drama movie. Which sampling method wou

ld likely provide a representative sample of the population?
A. Surveying the seventh grade sports team, because they would best represent seventh grade students.
B. Surveying every fourth seventh grade student as he or she arrives at school because it gives each seventh grade student an equal opportunity to be part of the survey.
C. Surveying every fourth student as he or she arrives at school because it gives each student in the school an equal opportunity to be part of the survey.
D. Surveying every member of the movie club because they would know how many students like action movies.
Mathematics
1 answer:
lana66690 [7]3 years ago
7 0
I think it would be B
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Let's add the two 1/4 lb weights because it is easier for they have a common denominator. Just simply add the numerators.

1/4 + 1/4 = 2/4

Then, add with this the fraction part of 2 1/5.

2/4 + 1/5 = ?
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2/4 + 1/5 = [(20/4 * 2) + (20/5 *1)]/20 = 14/20

14/20 is simplified to 7/10. Then add the whole number 2. <em>Therefore, the sum of all weights is 2 7/10 pounds.</em>
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6.23% probability that the fourth part retrieved from stock is the first defective

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= \dfrac{1}{4^2 \times 10}p^{7} q^{-2 + 3}

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4 0
3 years ago
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Hope this helps!

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