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Sergeu [11.5K]
3 years ago
13

Suppose that for a randomly selected high school student who has taken a college entrance exam, the probability of scoring above

650 is 0.30. A random sample of n = 10 students was selected. The mean μ of X, the number of students in the sample who have scores above 650 is ______.
Mathematics
1 answer:
Sophie [7]3 years ago
5 0

Answer:

3.0

Step-by-step explanation:

n=10

p=0.30

mean=np=10X0.3 = 3

That is it.

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J'Neices cell phone plan is $79 per month for unlimited calling plus 1000 text messages. Text messages over 1000 cost $0.15 each
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Answer:

C. 244

Step-by-step explanation:

It costs 79 dollars a month = 79x

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The equation is:

79x + 0.15y = z

X = months

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Let's plug in our values

79(1) + 0.15(1100) = z

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79 + 165 = z

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