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Aliun [14]
3 years ago
5

Help please 2+2-1-1+6=x

Mathematics
2 answers:
natita [175]3 years ago
8 0

Answer:

2+2-1-1+6=x : x = 8

Step-by-step explanation:

2+2-1-1+6=x\\

Switch sides:

x=2+2-1-1+6

Add/Subtract the numbers: 2+2-1-1+6=8

x = 8

Hope I helped, if so may I get brainliest and a thanks?

Thank you, have a good day! =)

Anestetic [448]3 years ago
6 0

Answer:

8

Step-by-step explanation:

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Suppose it is known that 60% of radio listeners at a particular college are smokers. A sample of 500 students from the college i
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Answer:

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Step-by-step explanation:

Let the random variable <em>X</em> be defined as the number of students at a particular college who are smokers

The random variable <em>X</em> follows a Binomial distribution with parameters n = 500 and p = 0.60.

But the sample selected is too large and the probability of success is close to 0.50.

So a Normal approximation to binomial can be applied to approximate the distribution of X if the following conditions are satisfied:

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Thus, a Normal approximation to binomial can be applied.

So,  

X\sim N(\mu=600, \sigma=\sqrt{120})

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Apply continuity correction:

P (X ≥ 280) = P (X > 280 + 0.50)

                   = P (X > 280.50)

                   =P(\frac{X-\mu}{\sigma}>\frac{280-300}{\sqrt{120}}\\=P(Z>-1.83)\\=P(Z

*Use a <em>z</em>-table for the probability.

Thus, the probability that at least 280 of these students are smokers is 0.9664.

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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