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Burka [1]
2 years ago
6

a store has 300 television on order and 80% are high definition . how many television are in order are high definition

Mathematics
1 answer:
oksano4ka [1.4K]2 years ago
8 0
240 multiply 300 by 0.8

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4.20. According to a report released by the National Center for Health Statistics, 51% of U.S. households has only cell phones (
Sergeu [11.5K]

Answer:

The probability that the household has only cell phones and has high-speed Internet is 0.408

Step-by-step explanation:

Let A be the event that represents U.S. households has only cell phones

Let B be the event that represents U.S. households have high-speed Internet.

We are given that 51% of U.S. households has only cell phones

P(A)=0.51

We are given that 70% of the U.S. households have high-speed Internet.

P(B)=0.7

We are given that U.S. households having only cell phones, 80% have high-speed Internet. A U.S household is randomly selected.

P(B|A)=0.8

\frac{P(A\capB)}{P(A)}=0.8\\P(A\capB)=0.8 \times P(A)\\P(A\capB)=0.8 \times 0.51\\P(A\capB)=0.408

Hence the probability that the household has only cell phones and has high-speed Internet is 0.408

7 0
2 years ago
If a coin is flipped 20 times and a head comes up 7 times, what is the relative frequency of a head coming up?
Tju [1.3M]
Relative frequency is the absolute frequency (i.e. the number of times of the wanted result) divided by the total  number of events.

In this case you have to calculate: the number of heads that came up divided by the number of times the coin was flipped.

Number of times the coin was flipped: 20
Numbef of times head came up: 7

Relative frequency: 7 / 20 = 0.35, which is the option B.
7 0
3 years ago
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A bag has 3 red rocks, 4 green rocks, 3 blue rocks, 3 speckled rocks,
jolli1 [7]

Answer:

3/17 or 17.64%

Step-by-step explanation:

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5 0
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A prism is completely filled with 784 cubes that have an edge length of 1/2 cm what is the volume of the prism
Dvinal [7]
1’176 is the exact number
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2 years ago
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