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Igoryamba
3 years ago
10

Twenty-six students apply to serve as an usher at a school function. Eight of the those applying are freshmen, 7 are sophomores,

6 are juniors, and 5 are seniors. Suppose 13 of those who apply are randomly selected by drawing names. Which statement BEST describes this situation?
A) The situation is an example of uniform probability because exactly
1
2
of the applicants are being selected.
B) The situation is not an example of uniform probability because the same number of students will be selected as rejected.
C) The situation is an example of uniform probability because freshmen, sophomores, juniors, and seniors have equal probabilities of being selected.
D) The situation is not an example of uniform probability because freshmen, sophomores, juniors, and seniors do not have equal
Mathematics
2 answers:
Gelneren [198K]3 years ago
6 0

Answer:

d

Step-by-step explanation:

from usatestprep:

The situation is not an example of uniform probability because freshmen, sophomores, juniors, and seniors do not have equal probabilities of being selected.; Uniform probability → equal probability of being selected

P(freshman) =  

8/

26

; P(sophomore) =  

7 /

26

; P(junior) =  

6 /

26

; P(senior) =

5 /

26

; unequal probabilities → not uniform

Virty [35]3 years ago
6 0

Answer:

d

Step-by-step explanation:

usatestprep

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Which of the following is equivalent to (2x + 3)(2x + 3)?
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<em><u>Solution:</u></em>

Let "x" be the pounds of type A coffee

Let "y" be the pounds of type B coffee

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Cost per pound of Type B = $ 4.20

<em><u>This month, Chau made 143 pounds of the blend</u></em>

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<em><u>For a total cost of $677.30. Thus we frame a equation as:</u></em>

pounds of type A coffee x Cost per pound of type A + pounds of type B coffee x Cost per pound of Type B = 677.30

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<em><u>Let us solve eqn 1 and eqn 2</u></em>

<em><u>Substitute eqn 1 in eqn 2</u></em>

5.5(143-y) +4.2y = 677.30\\\\786.5 -5.5y + 4.2y = 677.30\\\\5.5y - 4.2y = 786.5 - 677.30\\\\1.3y = 109.2\\\\Divide\ both\ sides\ by\ 1.3\\\\y = 84

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