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marin [14]
2 years ago
14

It is known that 40% of adult workers have a high school diploma. If a random sample of 10 adult workers is selected, what is th

e expected number of adult workers with a high school diploma? (That is, what is E(X)?) Round to the whole number. Do not use decimals. Answer:
Mathematics
1 answer:
Maurinko [17]2 years ago
4 0

Answer:

The expected number of adult workers with a high school diploma is 4.

Step-by-step explanation:

This random variable X can be modeled with the binomial distribution, with parameters n=10 (the sample size) and p=0.4 (the probability that a adult worker have a high school diploma).

The expected value of X is then the mean of the binomial distribution with the parameters already mentioned.

This is calculated as:

E(X)=\mu_b=n\cdot p=10\cdot0.4=4

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6 0
3 years ago
A manufacturing company has the following fixed monthly costs and unit variable costs: Rent = $2,200 Utilities = $375 Variable c
valentinak56 [21]

A manufacturing company has the following fixed monthly costs and unit variable costs:

Rent = $2,200

Utilities = $375

Variable costs for materials and assembly = $13.25/unit

Monthly labor = $750

Given is the product is sold at $24.99 per unit

Let the number of units sold be x

Adding total cost = 2200+375+750=3325

Equation becomes:

3325+13.25x=24.99x

11.74x=3325

x= 283.21

So, rounding it to nearest whole number we get, 283 units.

3 0
3 years ago
BRAINLIESTT ASAP! PLEASE HELP ME :)
vfiekz [6]

Answer:

Final answer is approx 6.644 years.

Step-by-step explanation:

8 0
2 years ago
A refrigerator costs $580 a year to run. A family purchases a new one for $1200 that will save them 22% annually in energy costs
NeTakaya

Answer:

It will take nine years and four months for the refrigerator to pay for itself.

Step-by-step explanation:

The new refrigerator which costs $1200, saves the family 22% annually in energy cost.

Since the old refrigerator costs $580 to run, we want to determine how many years it will take for 22% of $580 per year to make $1200.

22% of $580

= 580 × 0.22

= 127.6

That is, it saved then $127.6 per year.

Now,

$1200/127.6

≈ 9.4

Which means, it will take 9 years and 4 months for the refrigerator to pay for itself.

7 0
2 years ago
Last night Erin completed 5/6 of the homework assignment. Tom completed 1/3 of the same assignment. How much more of the assignm
Lynna [10]

Answer:

50 more

Step-by-step explanation:

5/6=0.83= 83%

1/3=0.33= 33%

83%-33%= 50

3 0
3 years ago
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