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4 years ago

Original price of a book: $150.00 Discount: 60%, Selling Price?

Mathematics

2 answers:

liberstina [14]4 years ago

6 0

Answer:

$60

Step-by-step explanation:

Multiply 150 with 60%:

Note that 60% = 60/100 = 0.60

150 x 0.60 = 90

Subtract 90 from 150:

150 - 90 = 60

$60 is your selling price.

alina1380 [7]4 years ago

5 0

The selling price is 60$

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4 years ago

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:

The probability that at least 280 of these students are smokers is 0.9664.

Step-by-step explanation:

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

The random variable X 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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2. n(1 - p) ≥ 10

Check the conditions as follows:

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Thus, a Normal approximation to binomial can be applied.

So,

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

Compute the probability that at least 280 of these students are smokers as follows:

Apply continuity correction:

P (X ≥ 280) = P (X > 280 + 0.50)

= P (X > 280.50)

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3 years ago

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3 years ago

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Answer:

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gladu [14]

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