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Leya [2.2K]
3 years ago
5

6.

Mathematics
2 answers:
natima [27]3 years ago
7 0

Answer:

273

Step-by-step explanation:

CDs to DVDs is 3:5

\frac{728}{3+5}

\frac{728}{8}=91

3 \times 91: 5 \times 91

273:455

273 CDs were sold.

sleet_krkn [62]3 years ago
5 0

Answer:

273

Step-by-step explanation:

CD(3):DVD(5)

3+5=8

728 divided by 8= 91

3x91=273

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The proportion of left handed people in the population is about 0.10. Suppose a random sample of 300 people is observed. (a) Wha
pantera1 [17]

Answer: (\hat{p})\sim N(0.10,\ 0.017)

Step-by-step explanation:

Sampling distribution of the sample proportion (\hat{p}) :

(\hat{p})\sim N(p,\ \sqrt{\dfrac{p(1-p)}{n}})

The sampling distribution of the sample proportion (\hat{p}) has mean = \mu_{\hat{p}}=p and standard deviation = \sigma_{\hat{p}}=\sqrt{\dfrac{p(1-p)}{n}}.

Given : The proportion of left handed people in the population is about 0.10.

i.e. p=0.10

sample size : n= 300

Then , the sampling distribution of the sample proportion(\hat{p}) will be :-

(\hat{p})\sim N(0.10,\ \sqrt{\dfrac{0.10(1-0.10)}{300}})

(\hat{p})\sim N(0.10,\ \sqrt{0.0003})

(\hat{p})\sim N(0.10,\ 0.017)  (approx)

Hence, the sampling distribution of the sample proportion(\hat{p}) is (\hat{p})\sim N(0.10,\ 0.017)

8 0
3 years ago
Two sides of a triangle measure 10cm and 15cm. which measure is possible for the third side
Irina-Kira [14]
The measurement for the third side is 155 cm. Hope this helps! Mark my answer brainliest when u can please thx
6 0
4 years ago
3 over 9 + 2 over 3
OleMash [197]

Answer:

1

Step-by-step explanation:

3/9 is equal to 1/3 so 1/3+2/3= 3/3 making it 1 whole

4 0
3 years ago
Read 2 more answers
3 1/2+(-6)-(-1 1/2-9 3/4)
poizon [28]

Answer:

Now I dont know if the three in the front is supposed to be in there or if its numbering the problem so I solved it with and without it. The first ones with and the second one without.

=8 3/4

(Decimal: 8.75)

=5 3/4

(Decimal: 5.75)

8 0
3 years ago
Consider -103/-3. Which statements are correct?
kirill [66]

Answer:

D is the correct answer

Step-by-step explanation:

negative ÷ negative = positve

7 0
3 years ago
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